--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test-data/TEST0000_mzrt_match_unmatched_second.tsv	Thu Jun 10 15:41:17 2021 +0000
@@ -0,0 +1,355 @@
+rowID1	MZ1	RT1	rowID2	MZ2	RT2
+			SecondID_3088	474.33701284	11.771818635
+			SecondID_4052	884.769238598	14.1644190354
+			SecondID_2754	419.311817676	15.4964813566
+			SecondID_7014	456.37388117	14.9954898934
+			SecondID_6342	339.281155343	10.4749860935
+			SecondID_5554	638.610681094	16.8243350378
+			SecondID_2573	402.320361263	15.9626402175
+			SecondID_5695	474.306519534	13.8220188893
+			SecondID_66	678.677828189	14.0283143024
+			SecondID_3118	781.556008557	6.26047220111
+			SecondID_4290	760.580054989	13.0230049688
+			SecondID_5476	420.283926904	12.7927849457
+			SecondID_3393	568.337713663	15.2714860912
+			SecondID_873	313.236296609	15.5251390939
+			SecondID_5690	563.418958485	7.83454459392
+			SecondID_274	592.561271224	7.74400392255
+			SecondID_1661	678.481019351	14.7273071327
+			SecondID_7233	952.832654376	7.16358748063
+			SecondID_1690	925.761182825	14.6697459941
+			SecondID_1431	376.298471698	15.0603858636
+			SecondID_4673	440.405165426	6.2055020238
+			SecondID_7444	521.299827724	14.2702357846
+			SecondID_6952	530.39731987	10.9188560672
+			SecondID_2536	648.433603583	14.4089733336
+			SecondID_5388	517.395891908	13.5031077653
+			SecondID_1899	745.587949109	11.6001568875
+			SecondID_7036	301.14086892	13.5507163289
+			SecondID_4165	672.537165653	7.95180867761
+			SecondID_3727	432.275877298	14.1690529427
+			SecondID_6741	898.733862062	15.7106911769
+			SecondID_4529	678.682622972	6.00830492099
+			SecondID_1658	580.573248819	15.3079459881
+			SecondID_1665	837.605253098	8.11458108714
+			SecondID_3937	604.40708345	15.2775174895
+			SecondID_538	751.56836177	15.624566979
+			SecondID_2140	419.278522383	6.88114946779
+			SecondID_936	664.454016817	15.3606205784
+			SecondID_839	554.515281712	15.2840250845
+			SecondID_1564	487.38244688	15.07894859
+			SecondID_3069	496.477028255	13.8754816499
+			SecondID_2977	560.378317973	14.9497851728
+			SecondID_1573	729.663099012	15.34341508
+			SecondID_785	492.891376296	15.3603192448
+			SecondID_3353	428.330757241	13.59121764
+			SecondID_197	358.355237454	15.3681778848
+			SecondID_3638	429.304967019	6.91365149881
+			SecondID_7744	893.69487108	14.7461397703
+			SecondID_4596	356.915590519	15.3165300327
+			SecondID_7667	510.40458689	14.1070405895
+			SecondID_633	591.43098635	15.4783978199
+			SecondID_3383	371.069589314	14.8150340763
+			SecondID_1710	811.560893723	15.1411292737
+			SecondID_2304	874.793977613	8.12438290044
+			SecondID_3343	524.465832665	14.7897762791
+			SecondID_711	397.292802375	15.6373031178
+			SecondID_7461	958.880382144	15.5843989792
+			SecondID_2487	610.579488188	5.75704445606
+			SecondID_6879	458.309801447	14.7368557939
+			SecondID_1494	462.362585993	14.634978868
+			SecondID_196	624.556645393	8.79084965569
+			SecondID_417	397.323946676	6.11350172079
+			SecondID_5708	931.771418623	14.4585163663
+			SecondID_2508	752.06847106	15.2058865542
+			SecondID_7134	663.470655844	7.11199608533
+			SecondID_6789	784.718709232	14.9687189634
+			SecondID_5571	624.597924595	15.9959691199
+			SecondID_7332	382.391232271	14.7321203745
+			SecondID_3985	460.32951719	1.66593470555
+			SecondID_7379	909.784737279	14.6398434857
+			SecondID_2160	1006.8871886	7.27486219665
+			SecondID_5831	537.404342844	15.821651632
+			SecondID_51	877.723370861	15.0278511437
+			SecondID_5243	454.386196766	14.6523947084
+			SecondID_2	607.558454363	11.1457886781
+			SecondID_7289	940.823527538	11.7538826031
+			SecondID_6693	429.34524688	7.60814891808
+			SecondID_6062	556.459830976	8.12185910346
+			SecondID_5234	516.395531071	14.4045994099
+			SecondID_598	963.83095327	14.5488777096
+			SecondID_4526	590.424257167	15.6148983338
+			SecondID_115	335.212128858	14.7057323921
+			SecondID_2210	566.515801854	7.44632785588
+			SecondID_5099	623.465369008	15.4563555765
+			SecondID_7662	701.629807475	14.9489372628
+			SecondID_2058	651.649599438	14.7259409094
+			SecondID_685	908.76997684	7.04864961811
+			SecondID_6767	339.294509258	16.9084054253
+			SecondID_6761	793.792557834	14.3808347815
+			SecondID_4211	678.491939369	8.31934612179
+			SecondID_7765	502.337792766	9.68045143152
+			SecondID_3610	594.578923131	15.2711362854
+			SecondID_7544	730.541243967	14.6130749568
+			SecondID_3082	472.336970171	8.48129258917
+			SecondID_1900	311.295189684	15.2165609538
+			SecondID_2138	850.789586573	0.425987641208
+			SecondID_2233	767.536693295	11.254434197
+			SecondID_7251	651.500146979	15.4678171163
+			SecondID_6882	652.624366013	8.25197982421
+			SecondID_5694	384.34668745	15.6759281777
+			SecondID_7144	1054.29191839	9.22628840297
+			SecondID_6594	612.523947488	15.7197329726
+			SecondID_2133	834.783103703	7.57542574098
+			SecondID_1653	583.55442847	14.2736836661
+			SecondID_3108	496.395715149	15.1476455525
+			SecondID_2664	590.422525743	6.29079032036
+			SecondID_7181	853.807970441	16.5822028238
+			SecondID_1086	664.666468202	14.0822141159
+			SecondID_3391	928.823993024	14.3550382714
+			SecondID_303	376.300926097	14.1881734307
+			SecondID_531	339.292138422	14.3440522587
+			SecondID_5440	934.772105084	1.76090351771
+			SecondID_2568	386.290716371	3.5928801082
+			SecondID_821	604.401008893	15.0056182536
+			SecondID_2546	486.376655733	9.866824632
+			SecondID_5475	341.398238939	7.73260922858
+			SecondID_4504	480.546495175	14.9254443431
+			SecondID_1969	402.281953854	14.9048873373
+			SecondID_3206	428.331611715	14.7747473978
+			SecondID_1238	430.388463899	15.4340312607
+			SecondID_1038	500.321353304	15.949708436
+			SecondID_4548	465.42743609	14.6218638833
+			SecondID_823	398.757972832	15.6068544725
+			SecondID_71	400.3141242	8.12917604225
+			SecondID_7534	568.491039483	7.54260688331
+			SecondID_654	486.345072774	14.5916887892
+			SecondID_7128	482.351282949	15.1659038592
+			SecondID_4827	440.307558408	14.3406605441
+			SecondID_532	356.918630894	7.77400055101
+			SecondID_1656	582.515454808	7.70097249573
+			SecondID_454	949.80471254	14.3118543737
+			SecondID_5430	425.21085626	14.6463339622
+			SecondID_7187	440.367837243	14.5826227059
+			SecondID_4779	578.525102495	15.0881789352
+			SecondID_1600	444.339810325	13.7936726458
+			SecondID_6242	500.284786506	15.2084397973
+			SecondID_7812	880.745942941	15.04884154
+			SecondID_1960	526.454845048	15.2181703092
+			SecondID_1166	935.874746089	0.166969789417
+			SecondID_2365	663.450295601	14.4290163621
+			SecondID_7081	631.460080605	15.2573245221
+			SecondID_6201	778.891877693	7.27032775865
+			SecondID_2520	594.512619738	15.0550203149
+			SecondID_151	936.792597849	1.18746019196
+			SecondID_1805	532.374094269	13.7979073159
+			SecondID_40	743.536375019	15.7529824372
+			SecondID_339	496.396183247	8.30528391858
+			SecondID_4508	944.713169302	13.4549197887
+			SecondID_5648	666.680123859	4.88458589921
+			SecondID_6870	590.420205248	14.4210188786
+			SecondID_3446	819.575547782	13.7653027851
+			SecondID_5715	881.744001941	15.1766872635
+			SecondID_3283	474.311036887	8.18431112184
+			SecondID_6028	874.963450506	1.01414982522
+			SecondID_4971	768.536535622	15.1550452647
+			SecondID_7314	841.702471817	5.95929229977
+			SecondID_3753	447.344028097	6.49191574979
+			SecondID_3258	636.622225593	15.5757809864
+			SecondID_406	482.34498135	15.220317302
+			SecondID_2005	811.569568702	7.96554053828
+			SecondID_1849	665.004649509	7.77209923678
+			SecondID_6721	550.631189537	14.9288733195
+			SecondID_7153	779.580821503	15.4915977552
+			SecondID_6546	629.55967649	14.6332975517
+			SecondID_3265	579.532890196	14.3237126038
+			SecondID_4014	458.383213303	15.0524245159
+			SecondID_2405	370.297565529	8.02897401395
+			SecondID_1726	993.865472214	15.1830736153
+			SecondID_3691	312.329423307	14.2829999618
+			SecondID_984	524.430019238	6.94355031271
+			SecondID_1337	967.71099141	12.984678482
+			SecondID_1065	479.391781996	8.06348099803
+			SecondID_6492	442.277351994	15.1194595423
+			SecondID_7033	457.373841881	7.38751799123
+			SecondID_6663	546.400973071	14.8652433572
+			SecondID_2402	485.107758237	14.1432621404
+			SecondID_3420	560.412571889	14.6798947385
+			SecondID_3083	399.245530501	8.29860114975
+			SecondID_692	484.436430845	15.7157132879
+			SecondID_7105	992.951986934	5.45299488011
+			SecondID_767	723.505507244	6.62709672383
+			SecondID_1832	975.737755006	0.388324737625
+			SecondID_2681	582.466223185	14.5180593606
+			SecondID_5377	360.246217957	15.4459376911
+			SecondID_3430	724.507010251	14.4543716791
+			SecondID_6943	635.452015865	7.57261861637
+			SecondID_1719	528.430338459	15.1238258437
+			SecondID_6308	526.479100979	6.21541313178
+			SecondID_2634	510.452852177	8.94603837635
+			SecondID_6276	460.357101992	15.4080842452
+			SecondID_6268	1015.04984462	7.52130458034
+			SecondID_7180	356.352406364	7.06769125814
+			SecondID_6945	430.39689846	14.5398894092
+			SecondID_494	414.358693482	14.0225966684
+			SecondID_5784	398.253578202	13.7492682707
+			SecondID_6485	568.497113854	14.5806576518
+			SecondID_6988	934.866208467	8.15425632133
+			SecondID_1468	707.490772104	14.3719019415
+			SecondID_5498	1014.22371239	15.3692532686
+			SecondID_1666	666.646227788	15.2689600129
+			SecondID_5007	810.559806948	14.8827374303
+			SecondID_1614	720.723192603	15.5693162338
+			SecondID_5046	613.477726247	15.3406642073
+			SecondID_2874	612.565258561	7.49383514855
+			SecondID_1988	892.825074029	14.220723849
+			SecondID_1976	550.519410915	15.3917905372
+			SecondID_4506	464.309231767	9.75865594127
+			SecondID_1566	964.9321969	6.85888455934
+			SecondID_6141	545.426401083	12.7268662815
+			SecondID_3526	335.215671346	15.6511179937
+			SecondID_684	766.537951438	15.0695098256
+			SecondID_5153	432.274068987	15.4467164789
+			SecondID_1551	485.358200559	14.3738963329
+			SecondID_1515	485.409168872	5.85432613744
+			SecondID_2593	458.320999268	14.5290561382
+			SecondID_6177	560.386781502	13.010404415
+			SecondID_1459	554.477791611	14.0391388142
+			SecondID_5893	335.216485015	14.8171991688
+			SecondID_418	678.688465617	14.6124714536
+			SecondID_1795	485.437601107	8.30515658298
+			SecondID_1767	582.473674327	16.0987717165
+			SecondID_5269	631.334688119	14.7148968277
+			SecondID_5672	478.319260751	13.9425387639
+			SecondID_2471	456.299518552	14.2228959567
+			SecondID_5290	923.780374748	14.6832332055
+			SecondID_6783	940.834273275	15.6179716394
+			SecondID_4549	766.521984994	14.6855796431
+			SecondID_438	374.25265515	15.8748119241
+			SecondID_4336	356.3096816	15.0436888166
+			SecondID_6160	304.301081008	15.4366411433
+			SecondID_5993	374.284401588	6.55043642895
+			SecondID_6353	498.312375001	14.8181838846
+			SecondID_306	589.446676737	13.4254271177
+			SecondID_4887	483.33993393	14.2261100194
+			SecondID_5220	932.867911551	16.115789912
+			SecondID_3613	540.497690183	14.9465487532
+			SecondID_6314	414.312117927	14.7415560115
+			SecondID_2797	560.406159737	6.51934177844
+			SecondID_7012	510.436966662	7.60206347361
+			SecondID_2749	482.341705449	15.5626641786
+			SecondID_2159	540.460774733	15.3587115395
+			SecondID_5159	722.506267114	15.8332328484
+			SecondID_5726	500.43373778	15.6411184785
+			SecondID_705	665.461353339	14.3626274844
+			SecondID_6189	567.426424657	8.65424841432
+			SecondID_2623	596.608858018	7.87644969797
+			SecondID_1044	304.293543458	16.9849249634
+			SecondID_2564	402.252358101	9.25365565732
+			SecondID_3229	880.990799416	8.23577477463
+			SecondID_7660	716.565797892	14.7984671636
+			SecondID_5802	500.395822547	15.1939014338
+			SecondID_3686	767.535969503	6.46237638095
+			SecondID_3786	487.395017016	8.12896662002
+			SecondID_5268	563.35254205	14.629383722
+			SecondID_6623	524.511683846	14.7416082969
+			SecondID_5137	370.26804606	14.4399165769
+			SecondID_268	302.192738359	4.0122289847
+			SecondID_5171	337.226584199	8.03256220477
+			SecondID_6232	311.178878218	14.8290416647
+			SecondID_7491	675.510125643	14.2231895336
+			SecondID_6036	470.30994737	14.6875431899
+			SecondID_2529	877.712360506	15.5315555929
+			SecondID_6859	382.255072433	4.92316399309
+			SecondID_6786	517.35459845	14.5274590933
+			SecondID_793	972.894264059	8.40844588776
+			SecondID_6758	1001.0722777	14.6046158153
+			SecondID_1846	442.363821075	13.7339954539
+			SecondID_2205	485.434413284	1.8972329263
+			SecondID_3956	560.419128987	9.33999964808
+			SecondID_5705	855.958079736	13.5866786242
+			SecondID_1998	951.823627221	14.5788025033
+			SecondID_3872	962.811453339	14.1719151473
+			SecondID_6207	339.24771056	13.9981376741
+			SecondID_6051	771.640950154	14.8975210198
+			SecondID_1425	683.587963824	8.07156175005
+			SecondID_3007	442.390249693	8.38183947746
+			SecondID_4917	791.695161773	14.7974941577
+			SecondID_2156	396.274333316	6.65395366527
+			SecondID_2902	636.455998536	13.1477615538
+			SecondID_6113	912.798920961	14.8370082011
+			SecondID_7219	892.726863102	8.16979688716
+			SecondID_96	926.729856884	14.6524279112
+			SecondID_3741	955.762137536	13.488113638
+			SecondID_7298	568.429539428	1.8741906284
+			SecondID_1595	672.544056371	14.6351089664
+			SecondID_5242	663.460544089	8.14226603368
+			SecondID_5925	1069.33906621	15.421347344
+			SecondID_2084	498.452909471	14.9476620997
+			SecondID_5315	594.581041568	13.9407758223
+			SecondID_6790	723.564317866	14.8122301292
+			SecondID_5244	990.841181985	13.5467710682
+			SecondID_1305	428.337771357	14.9390355291
+			SecondID_4690	570.471609871	8.08055138543
+			SecondID_3817	875.805125207	9.43919213795
+			SecondID_4020	560.407299001	14.8890810678
+			SecondID_1092	428.269289139	14.9314772899
+			SecondID_2504	399.253164906	9.28210698916
+			SecondID_6739	458.316601655	16.2754767746
+			SecondID_457	427.405894663	16.1414458749
+			SecondID_1520	441.369533121	14.6353923368
+			SecondID_5793	652.665739057	14.9161767389
+			SecondID_286	591.433156085	8.09369271811
+			SecondID_6192	604.389569888	14.8540693543
+			SecondID_2172	652.635099007	16.2522294783
+			SecondID_1565	398.293621136	15.7825722158
+			SecondID_7742	468.401911809	5.52669120114
+			SecondID_226	307.191343298	13.5023127584
+			SecondID_5344	375.250791422	5.26350640894
+			SecondID_957	366.257075749	16.6945406407
+			SecondID_1395	388.235921146	5.66121984341
+			SecondID_7385	520.326355923	12.8799928117
+			SecondID_30	508.470750712	14.1767905539
+			SecondID_1771	651.571436282	14.3242535538
+			SecondID_875	384.240585997	7.22098330036
+			SecondID_3339	415.329881818	3.25154145718
+			SecondID_6061	598.46561678	16.0000159785
+			SecondID_1918	550.525731388	14.7776898394
+			SecondID_4616	771.705897215	4.69484199179
+			SecondID_4624	609.560846262	13.6142970431
+			SecondID_7677	502.418750697	14.5004726293
+			SecondID_741	984.826772343	15.0381667455
+			SecondID_5395	542.373792668	15.0453454048
+			SecondID_990	370.324180468	14.5666296752
+			SecondID_6134	388.241718156	7.00783843018
+			SecondID_772	610.537247739	9.68471282919
+			SecondID_4775	552.541878558	15.02039101
+			SecondID_6705	767.531574741	16.1625472966
+			SecondID_3202	1025.92968254	14.8069571932
+			SecondID_4044	802.794752978	8.21365390865
+			SecondID_3908	548.415985426	6.013148271
+			SecondID_3452	551.347200589	14.1776027917
+			SecondID_4225	608.557242924	7.91657253359
+			SecondID_6093	432.279562321	14.3404904865
+			SecondID_3053	806.506256521	1.30308549565
+			SecondID_1421	500.352698079	11.9744066496
+			SecondID_7516	785.723954604	13.094564867
+			SecondID_4003	770.564873805	1.93711951648
+			SecondID_1660	766.580478461	14.2755654564
+			SecondID_917	695.504222687	15.4091958031
+			SecondID_1675	801.722970043	3.99166498357
+			SecondID_718	568.490663666	14.4971360866
+			SecondID_4179	763.500544244	14.6588486107
+			SecondID_5881	416.262628562	15.2131128132
+			SecondID_782	974.818336728	14.8166717425
+			SecondID_6023	380.278395883	16.5627405045
+			SecondID_554	608.604920131	8.24088307165
+			SecondID_7478	530.398842219	14.9882397076
+			SecondID_4224	678.687385357	14.2450159062
+			SecondID_6620	1007.2877809	14.9107169667
+			SecondID_1803	810.561655474	7.13282855041
+			SecondID_4655	390.252471183	14.4917822781
+			SecondID_827	369.354448257	14.7546365633
+			SecondID_819	552.532546317	7.57645138299
+			SecondID_7278	638.609704144	16.0072765188
+			SecondID_3214	486.342441357	13.9846687591