C1111233131211111211113313331333133313331312331333133112312111133223231   >>    C111123313121111121111331333133313331333131233133313311231211113322323   <<    C1111233131211111211113313331333133313331312331333133112312111133223233   >>      C1111233131211111211113313331333133313331312331333133112312111133223232   >>