C313212111133131211331333133313331333133313231333133313331333133313211232323211   >>    C31321211113313121133133313331333133313331323133313331333133313331321123232321   <<    C313212111133131211331333133313331333133313231333133313331333133313211232323213   >>      C313212111133131211331333133313331333133313231333133313331333133313211232323212   >>