mu 1 2 3
mu 3 2 4
mu 3 4 5
mu 3 5 6
mu 2 6 7
mu 3 6 8
mu 2 8 9
mu 4 7 10
mu 6 7 11
mu 6 8 12
mu 11 5 13
mu 6 10 14
mu 7 10 15
mu 4 12 16
mu 10 11 17
mu 1 13 18
mu 1 17 19
oup 16 17 13 12 3 9 14 7 18 4 19 15 8 11 10 6 16
echo "Classes 8A 10AB 10CD 13AB 15AB 15CD 21AB 6C 6D 8E 12D 12E 14A 16A 24A 24B"

