C11112331312111112111133133313231333132313232233133313233311312311   >>    C1111233131211111211113313331323133313231323223313331323331131231   <<    C11112331312111112111133133313231333132313232233133313233311312313   >>      C11112331312111112111133133313231333132313232233133313233311312312   >>