C111123313331323113313331333133313331323132311233133313223331312111   >>    C11112331333132311331333133313331333132313231123313331322333131211   <<    C111123313331323113313331333133313331323132311233133313223331312113   >>      C111123313331323113313331333133313331323132311233133313223331312112   >>