C11112331312111112111133133313331323132313232233133313231321123121   >>    C1111233131211111211113313331333132313231323223313331323132112312   <<    C11112331312111112111133133313331323132313232233133313231321123123   >>      C11112331312111112111133133313331323132313232233133313231321123122   >>