C313212111133131211331333133313331333133311233133313221232213121   >>    C31321211113313121133133313331333133313331123313331322123221312   <<    C313212111133131211331333133313331333133311233133313221232213123   >>      C313212111133131211331333133313331333133311233133313221232213122   >>