Pos	A	C	G	U
1	0	0	1	0
2	0.75	0	0.25	0
3	0	0	0	1
4	0	1	0	0
5	1	0	0	0
6	1	0	0	0
7	0	1	0	0
8	0	1	0	0
9	0.5	0.25	0	0.25
10	0	0	1	0
11	0	0	1	0
12	0	1	0	0
13	0	0	1	0
14	1	0	0	0
15	0	1	0	0
16	0.75	0.25	0	0
17	0	0	1	0