# -*- coding: utf-8 -*-
from collections import Counter


N = int(input())
p = {}

for _ in range(N):
    s = input()
    if s not in p.keys():
        p[s] = 1
    else:
        p[s] += 1

M = int(input())

for _ in range(M):
    t = input()
    if t not in p.keys():
        p[t] = -1
    else:
        p[t] -= 1

print(max(max(p.values()), 0))
