mu 1 2 3
mu 3 2 4
mu 3 4 5
pwr 10 5 6
mu 5 4 7
mu 3 7 8
mu 3 8 9
mu 5 7 10
mu 3 10 11
pwr 7 11 12
mu 11 4 13
mu 8 11 14
pwr 3 14 15
mu 3 5 16
mu 3 16 17
mu 17 8 18
mu 18 5 19


echo "Classes 7GH 14AB 63AB 73AB 8A-B 14G-I 18A-C"
oup 7   19 15 6 12 3 13 9