C111123313331323113313331333133313231323221212111133132321123123111   >>    C11112331333132311331333133313331323132322121211113313232112312311   <<    C111123313331323113313331333133313231323221212111133132321123123113   >>      C111123313331323113313331333133313231323221212111133132321123123112   >>