C1111133313331323223313331333133313331323131211113313211223323121   >>    C111113331333132322331333133313331333132313121111331321122332312   <<    C1111133313331323223313331333133313331323131211113313211223323123   >>      C1111133313331323223313331333133313331323131211113313211223323122   >>