C111123313331323113313331333133313331323132311233133313132313231221   >>    C11112331333132311331333133313331333132313231123313331313231323122   <<    C111123313331323113313331333133313331323132311233133313132313231223   >>      C111123313331323113313331333133313331323132311233133313132313231222   >>