C313212111133131211331333133313331333133311233133313221333131223211   >>    C31321211113313121133133313331333133313331123313331322133313122321   <<    C313212111133131211331333133313331333133311233133313221333131223213   >>      C313212111133131211331333133313331333133311233133313221333131223212   >>