23 2 =46 1 A B C D 2 A 2 B 1 C 1 D 2 3 A B C D 4 395 509 A B C D 5 A B C D 6 4 A B C D 7 A B C D 8 A B C D 9 A B C D 10 A B C D 11 A 5 2 B 2 1 C 1 2 D 3 5 12 A B C D 13 A B C D 14 A B C D 15 A B C D 16 A B C D 17 A B C D 18 A B C D 19 A B C D 20 A B C D 21 A B C D 22 A B C D 23 A B C D 6 4 =24 1 A B C D 2 A B C D 3 A B C D 4 A B C D 5 A B C D 6 ACD A B C D