mu 1 2 7A
mu 7A 2 3
mu 7A 3 19A
mu 7A 19A 4
mu 4 3 15B
mu 19A 15B 10B
mu 19A 10B 6A
mu 15B 10B 5
mu 5 10B 11A
oup 6 6A 7A 10B 11A 15B 19A
echo "Classes 6A 7A 10B 11A 15B 19A"