C313212111133131211331333133313331333133311233133313113313232213233121   >>    C31321211113313121133133313331333133313331123313331311331323221323312   <<    C313212111133131211331333133313331333133311233133313113313232213233123   >>      C313212111133131211331333133313331333133311233133313113313232213233122   >>