mu 1 2 3
mu 3 2 4
mu 3 4 5
mu 3 5 6
mu 6 3 7
mu 1 7 8
mu 8 7 9
mu 9 8 10
mu 4 10 11
oup 6 7 10 9 6 3 11
echo "Classes 8C 8D 10A 12A 13A 16C"