C21231322221311331311211312111133132313223313331323232133313122331   >>    C2123132222131133131121131211113313231322331333132323213331312233   <<    C21231322221311331311211312111133132313223313331323232133313122333   >>      C21231322221311331311211312111133132313223313331323232133313122332   >>