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