C11112331312111112111133133313331323132313232233133313231333133211312121   >>    C1111233131211111211113313331333132313231323223313331323133313321131212   <<    C11112331312111112111133133313331323132313232233133313231333133211312123   >>      C11112331312111112111133133313331323132313232233133313231333133211312122   >>