C11112331312111112111133133313231333132313232233133321123231211   >>    C1111233131211111211113313331323133313231323223313332112323121   <<    C11112331312111112111133133313231333132313232233133321123231213   >>      C11112331312111112111133133313231333132313232233133321123231212   >>