C11112331312111112111133133313231333132313232233133313232213233331   >>    C1111233131211111211113313331323133313231323223313331323221323333   <<    C11112331312111112111133133313231333132313232233133313232213233333   >>      C11112331312111112111133133313231333132313232233133313232213233332   >>