C21231322221311331311211312111133133313233121133132213331333133313223313211   >>    C2123132222131133131121131211113313331323312113313221333133313331322331321   <<    C21231322221311331311211312111133133313233121133132213331333133313223313213   >>      C21231322221311331311211312111133133313233121133132213331333133313223313212   >>