C11112331312111112111133133313331323132313232233133313231331123232321211   >>    C1111233131211111211113313331333132313231323223313331323133112323232121   <<    C11112331312111112111133133313331323132313232233133313231331123232321213   >>      C11112331312111112111133133313331323132313232233133313231331123232321212   >>