a	5	4	0	12	12	12	12	12	11	12	5	4	6
c	0	0	0	0	0	0	0	0	0	0	1	2	1
g	3	2	0	0	0	0	0	0	0	0	2	1	2
t	4	6	12	0	0	0	0	0	1	0	4	5	3
//