P0       A     C     G     T
1        0     3     0     0
2        0     0     0     3
3        2     0     1     0
4        0     3     0     0
5        2     0     0     1
6        3     0     0     0
7        2     0     0     1
8        0     0     3     0
9        0     0     0     3
XX
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