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 3 8 9
mu 9 4 10
mu 8 5 11
mu 7 9 12
oup 7 12 9 5 11 6 3 10
echo "Classes 8AB 10A 11AB 6C 10C 12A 12C"
#echo " are in 12 9 5 11 6 3 10"