C111123313331323113313331333133313331323132311233133313232212231   >>    C11112331333132311331333133313331333132313231123313331323221223   <<    C111123313331323113313331333133313331323132311233133313232212233   >>      C111123313331323113313331333133313331323132311233133313232212232   >>