with open("input", "r") as f:
    lines = f.read().splitlines()

ranges = []
ingredients = []

for line in lines:
    if not line:
        continue
    if "-" in line:
        start, end = line.split("-")
        ranges.append((int(start), int(end)))
    else:
        ingredients.append(int(line))

s = 0

for ingredient in ingredients:
    for range_ in ranges:
        start, end = range_
        if start <= ingredient <= end:
            s += 1
            break

print(s)