from typing import Counter


def recount_answers(group):
    """Count the number of positive answers of a group.

    Only the questions to which everyone in a group answered
    yes to count.
    """
    people = len(group)
    line = ''.join([n.strip('\n') for n in group])
    count = Counter(line)
    number = 0
    for n, item in count.items():
        if item == people:
            number += 1
    return number