A |  11   2   2   2   4  28   0  46  46  12  28   0  46  46  12
C |   8   2   2  48  12   6   0   0   0  19   6   0   0   0  19
G |  19   0   0   0   6  12  48   2   2   8  12  48   2   2   8
T |  12  46  46   0  28   4   2   2   2  11   4   2   2   2  11