C11112331312111112111133133313231333132313232233133313113223332321   >>    C1111233131211111211113313331323133313231323223313331311322333232   <<    C11112331312111112111133133313231333132313232233133313113223332323   >>      C11112331312111112111133133313231333132313232233133313113223332322   >>