C313212111133131211331333133313331333133313231333133313331333133313232233132121   >>    C31321211113313121133133313331333133313331323133313331333133313331323223313212   <<    C313212111133131211331333133313331333133313231333133313331333133313232233132123   >>      C313212111133131211331333133313331333133313231333133313331333133313232233132122   >>