mu 1 2 3 mu 3 2 4 mu 3 4 5 mu 3 5 6 mu 5 4 7 mu 6 2 8 mu 3 6 9 mu 7 2 10 mu 6 7 11 mu 8 4 12 mu 9 8 13 mu 8 10 14 mu 5 10 15 mu 9 10 16 mu 11 7 17 mu 11 12 18 mu 15 6 19 mu 5 15 20 mu 16 14 21 mu 17 6 22 mu 11 17 23 mu 5 16 24 mu 24 16 25 mu 6 9 26 mu 26 9 27 mu 23 12 28 oup 12 16 15 22 23 7 3 8 18 17 27 14 25 oup 13 21 19 9 28 12 20 5 6 2 4 13 10 11 echo "Classes 6F 8A 8B 12B 12C 17AB 21AB 30AB 4I 6I 6J 6K" echo "6L 8D 8E 12D 12E 12F 12G 12H 14A 18A 20A 24A 30C"