a	9	8	7	18	16	17	16	18	18	18	0	10	8
c	1	2	1	0	1	0	0	0	0	0	0	2	3
g	2	2	6	0	0	0	0	0	0	0	0	2	3
t	6	6	4	0	1	1	2	0	0	0	18	4	4
//