Найдите букву Б.
ВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВБВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВВ