mu 1 2 3
mu 3 2 4
mu 3 4 5
mu 3 5 6
mu 2 6 7
mu 4 7 8
mu 6 8 9
mu 8 9 10
mu 3 9 11
mu 5 10 12
mu 1 12 13
oup 9 11 7 12 3 13 8 6 5 10
echo "Classes  6D 8AB 12AB 13AB 6F 12D 14A 18A 18C"