mu 1 2 3
mu 3 2 4
mu 3 4 5
mu 3 5 6
mu 6 3 7
mu 7 4 8
mu 2 8 9
mu 7 3 10
mu 6 9 11
mu 10 6 12
oup 10 12 11 5 7 10 9 8 6 3 4
echo "Classes 8A 10AB 10CD 15AB 6C 8C 12B 12C 14A 24A"
#echo "are in 12 11 5 7 10 9 8 6 3 4"