"""
Solution to 2020/01
"""

COUNT = 0
with open('input', 'r') as file:
    for line in file.readlines():
        rule, char, password = line.strip().split()
        char = char[0]
        min_occurence, max_occurence = rule.split('-')
        min_occurence = int(min_occurence)
        max_occurence = int(max_occurence)

        is_valid = min_occurence <= password.count(char) <= max_occurence

        if is_valid:
            COUNT += 1

print(COUNT)