mu 1 2 3
mu 3 2 4
mu 3 4 5
mu 3 5 6
mu 6 3 7
mu 7 4 8
mu 6 7 9
mu 4 8 10
mu 2 9 11
mu 5 11 12
mu 9 12 13
mu 4 4 14
mu 14 5 15
mu 1 7 16
mu 16 7 17
echo "Classes 6K 6L 6N 8A 9D 11A 12A 12D 12E 12F 12H 15A 18B"
oup 13   17 15 13 6 9 3 11 10 7 8 5 4 12