1       A       20.0    C       0.0     G       0.0     T       0.0
2       A       0.0     C       0.0     G       0.0     T       20.0
3       A       0.0     C       0.0     G       20.0    T       0.0
4       A       0.0     C       0.0     G       20.0    T       0.0
5       A       0.0     C       0.0     G       20.0    T       0.0
...
115     A       0.0     C       0.0     G       0.0     T       100.0
116     A       0.0     C       20.0    G       80.0    T       0.0
117     A       0.0     C       0.0     G       60.0    T       40.0
118     A       60.0    C       0.0     G       40.0    T       0.0
119     A       0.0     C       80.0    G       0.0     T       20.0
120     A       0.0     C       0.0     G       0.0     T       100.0