C1111233131211111211113313331333133313311211111133133313331333133313211223231   >>    C111123313121111121111331333133313331331121111113313331333133313331321122323   <<    C1111233131211111211113313331333133313311211111133133313331333133313211223233   >>      C1111233131211111211113313331333133313311211111133133313331333133313211223232   >>