A B C D E F G H I . A B 1 A C 5 A D 10 A E 15 A F 20 A G 25 A H 30 A I 35 B C 2 B D 5 B E 25 B F 20 B G 24 B H 30 B I 31 C D 3 C E 10 C F 15 C G 20 C H 22 C I 25 D E 2 D F 5 D G 10 D H 20 D I 15 E F 10 E G 2 E H 20 E I 18 F G 1 F H 8 F I 12 G H 2 G I 5 H I 1