C313212111133131211331333133313331333133311233133313211232213232321   >>    C31321211113313121133133313331333133313331123313331321123221323232   <<    C313212111133131211331333133313331333133311233133313211232213232323   >>      C313212111133131211331333133313331333133311233133313211232213232322   >>