A (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20)
B (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20)
C (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20)
D (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20)
E (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20)

(if (== [A] [B]) (<> [B] [C]))
(if (== [B] [C]) (<> [C] [D]))
(if (== [D] [E]) (<> [E] [A]))
(if (== [B] [D]) (<> [A] [C]))
