mu 1 2 3
mu 3 2 4
mu 3 4 5
mu 2 5 6
mu 4 6 7
mu 3 6 8
mu 2 7 9
mu 4 7 10
mu 6 7 11
mu 6 10 12
mu 7 10 13
mu 8 9 14
mu 8 11 15
mu 3 13 16
mu 4 15 17
mu 8 13 18
mu 6 12 19
mu 1 11 20
mu 20 6 21
echo "Classes 6JK 6LM 9CD 11AB 12AB 12CD 12FG 12HI 15AB 18AB 6O 6P 8D 10A 12J 16A 24A"
oup 17    9 14  6  3   8   21  19  12  17  10  4  7 18  11  13  16  15