найди буквы О : 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000о00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000о00000000000000000000000000000000000000000000000000000000000о0000000000000000000000000000000000: