text: str

with open("input.txt") as f:
    text = f.read()

total: int  = 0


ranges_str, dates = text.split("\n\n")

ranges: list[tuple[int, int]] = []
for range_str in ranges_str.splitlines():
    start, stop = range_str.split("-")
    ranges.append((int(start), int(stop)))

dates: list[int] = [int(date) for date in dates.splitlines()]
dates.sort()

for date in dates:
    for start, stop in ranges:
        if (start <= date <= stop):
            total += 1 
            break
print(total)