C21231322221311331311211312111133133331333133313331322331333133313223231   >>    C2123132222131133131121131211113313333133313331333132233133313331322323   <<    C21231322221311331311211312111133133331333133313331322331333133313223233   >>      C21231322221311331311211312111133133331333133313331322331333133313223232   >>