C313212111133131211331333133313331333133311233133313232331233132212321   >>    C31321211113313121133133313331333133313331123313331323233123313221232   <<    C313212111133131211331333133313331333133311233133313232331233132212323   >>      C313212111133131211331333133313331333133311233133313232331233132212322   >>