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

