# 3' splice model : psba 
# A C G T
26 14 40 21 
13 44 35 9 
41 3 33 23 
1 13 5 81 
splice
37 5 27 31 
62 5 9 24 
56 13 23 8 
32 28 6 33 
35 21 17 28 
53 12 10 26