C11112331312111112111133133313231333132313232233132322132322121   >>    C1111233131211111211113313331323133313231323223313232213232212   <<    C11112331312111112111133133313231333132313232233132322132322123   >>      C11112331312111112111133133313231333132313232233132322132322122   >>