BUGS

import datetime as dt


def in_range(cur):
    cur = cur - null_date
    cur = cur.days
    return birth <= cur <= death


first = [int(x) for x in input().split()]
second = [int(x) for x in input().split()]
birth = [int(x) for x in input().split()]
death = [int(x) for x in input().split()]
first = dt.date(year=first[0], month=first[1], day=first[2])
second = dt.date(year=second[0], month=second[1], day=second[2])
birth = dt.date(year=birth[0], month=birth[1], day=birth[2])
death = dt.date(year=death[0], month=death[1], day=death[2])
null_date = dt.date(year=1, month=1, day=1)

delta = second - first

birth = birth - null_date
birth = birth.days

death = death - null_date
death = death.days

ans = 0

if in_range(first):
    ans += 1

cur_first = first
while True:
    try:
        cur_first += delta
        if in_range(cur_first):
            ans += 1
    except Exception:
        break

cur_first = first
while True:
    try:
        cur_first -= delta
        if in_range(cur_first):
            ans += 1
    except Exception:
        break
print(ans)