C1111121111331311211331333133313331323331311312111133132233132313232212111   >>    C111112111133131121133133313331333132333131131211113313223313231323221211   <<    C1111121111331311211331333133313331323331311312111133132233132313232212113   >>      C1111121111331311211331333133313331323331311312111133132233132313232212112   >>