C1111233131211111211113313331333133313331333133313331333133313113313133222221   >>    C111123313121111121111331333133313331333133313331333133313331311331313322222   <<    C1111233131211111211113313331333133313331333133313331333133313113313133222223   >>      C1111233131211111211113313331333133313331333133313331333133313113313133222222   >>