5m Zen
4a 2 b 2 c 2 4ab 2bc 4ca
4a 2 b 2 c 2 4ab 2bc 4ca pictures 5
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4a 2 b 2 c
4a 2 b 2 c 2 4ab 2bc 4ca
4a 2 b 2 c 2 4ab 2bc 4ca