C1111121111331311211331333133313331323112113121111331323223313232212121   >>    C111112111133131121133133313331333132311211312111133132322331323221212   <<    C1111121111331311211331333133313331323112113121111331323223313232212123   >>      C1111121111331311211331333133313331323112113121111331323223313232212122   >>