--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test-data/Expchr17.tab	Tue Dec 15 05:35:36 2015 -0500
@@ -0,0 +1,121 @@
+CHROM	POS	reference	V1
+chr_17	1	C	U
+chr_17	2	C	U
+chr_17	3	C	U
+chr_17	4	T	U
+chr_17	5	A	U
+chr_17	6	A	U
+chr_17	7	C	U
+chr_17	8	C	U
+chr_17	9	C	U
+chr_17	10	T	U
+chr_17	11	A	U
+chr_17	12	A	U
+chr_17	13	C	U
+chr_17	14	C	U
+chr_17	15	C	U
+chr_17	16	T	U
+chr_17	17	A	F
+chr_17	18	A	U
+chr_17	19	C	U
+chr_17	20	C	U
+chr_17	21	C	U
+chr_17	22	T	U
+chr_17	23	A	U
+chr_17	24	A	U
+chr_17	25	C	U
+chr_17	26	C	U
+chr_17	27	C	U
+chr_17	28	T	U
+chr_17	29	A	U
+chr_17	30	A	U
+chr_17	31	C	U
+chr_17	32	C	U
+chr_17	33	C	U
+chr_17	34	T	U
+chr_17	35	A	U
+chr_17	36	A	U
+chr_17	37	C	G
+chr_17	38	C	U
+chr_17	39	C	U
+chr_17	40	T	F
+chr_17	41	A	U
+chr_17	42	A	U
+chr_17	43	C	U
+chr_17	44	C	U
+chr_17	45	C	U
+chr_17	46	T	U
+chr_17	47	A	U
+chr_17	48	A	U
+chr_17	49	C	U
+chr_17	50	C	U
+chr_17	51	C	U
+chr_17	52	T	U
+chr_17	53	A	U
+chr_17	54	A	U
+chr_17	55	C	U
+chr_17	56	C	U
+chr_17	57	C	U
+chr_17	58	T	U
+chr_17	59	A	U
+chr_17	60	A	R
+chr_17	61	T	U
+chr_17	62	A	U
+chr_17	63	C	U
+chr_17	64	G	U
+chr_17	65	C	U
+chr_17	66	G	U
+chr_17	67	C	U
+chr_17	68	G	U
+chr_17	69	C	U
+chr_17	70	G	U
+chr_17	71	C	U
+chr_17	72	C	U
+chr_17	73	T	R
+chr_17	74	A	U
+chr_17	75	A	U
+chr_17	76	C	U
+chr_17	77	C	U
+chr_17	78	C	U
+chr_17	79	T	U
+chr_17	80	A	U
+chr_17	81	C	T
+chr_17	82	G	U
+chr_17	83	A	U
+chr_17	84	C	U
+chr_17	85	T	U
+chr_17	86	T	U
+chr_17	87	T	U
+chr_17	88	A	U
+chr_17	89	A	U
+chr_17	90	C	U
+chr_17	91	C	U
+chr_17	92	T	U
+chr_17	93	A	U
+chr_17	94	C	U
+chr_17	95	T	U
+chr_17	96	C	U
+chr_17	97	T	U
+chr_17	98	A	U
+chr_17	99	A	U
+chr_17	100	A	U
+chr_17	101	C	U
+chr_17	102	T	U
+chr_17	103	C	U
+chr_17	104	T	U
+chr_17	105	C	F
+chr_17	106	C	U
+chr_17	107	T	U
+chr_17	108	A	U
+chr_17	109	C	U
+chr_17	110	T	U
+chr_17	111	A	U
+chr_17	112	G	F
+chr_17	113	T	U
+chr_17	114	A	U
+chr_17	115	C	U
+chr_17	116	G	U
+chr_17	117	T	U
+chr_17	118	C	U
+chr_17	119	T	U
+chr_17	120	T	U