key
    1    1    0    0
    2    1    0    0
    3    1    0    0
    4    1    0    0
    5    1    0    0
    6    1    0    0
    7    1    0    0
    8    1    0    0
    9    1    0    0
   10    1    0    0
   11    1    0    0
   12    1    0    0
   13    1    0    0
   14    1    0    0
   15    1    0    0
   16    1    0    0
   17    1    0    0
   18    1    0    0
   19    1    0    0
   20    1    0    0
   21    1    0    0
   22    1    0    0
   23    1    0    0
   24    1    0    0
   25    1    0    0

sx: s01 Ali Hassan Jackson 
1: 1 
2: 1 
3: 1 
4: 1  
5: 1  
6: 1  
7: 1 
8: 1 
9: 1 
10: 1 

sx: s02 Arch Prig 
1: 2 
2: 2 
3: 2 
4: 1
5: 1
6: 1
7: 1
8: 1
9: 1
10: 1