C313212111133131211331333133313331333133311233133313232331233132322221   >>    C31321211113313121133133313331333133313331123313331323233123313232222   <<    C313212111133131211331333133313331333133311233133313232331233132322223   >>      C313212111133131211331333133313331333133311233133313232331233132322222   >>