C11112331312111112111133133313231333132313232233133313223313233123313231323121   >>    C1111233131211111211113313331323133313231323223313331322331323312331323132312   <<    C11112331312111112111133133313231333132313232233133313223313233123313231323123   >>      C11112331312111112111133133313231333132313232233133313223313233123313231323122   >>