1b, 2c,3bcd,4cd,5bc,6cd,7ad,8bd,9bc,10c,11c,12a,13b,14ad,15b,16b, 17ad,18b, 19a,20d,21c
22a
23a  
24d
25b 
26bc, 
27a 
28b 
29b 
30d
31acd 
32bc
33bd