# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	Nw = int(input())
	W = getlist()
	Nb = int(input())
	B = getlist()
	W.sort(); B.sort()

	i = 0; j = 0
	ans1 = 0
	val = 0
	while True:
		if ans1 % 2 == 0:
			if i >= Nw:
				break
			if W[i] > val:
				ans1 += 1
				val = W[i]
			i += 1
		else:
			if j >= Nb:
				break
			if B[j] > val:
				ans1 += 1
				val = B[j]
			j += 1


	i = 0; j = 0
	ans2 = 0
	val = 0
	while True:
		if ans2 % 2 == 1:
			if i >= Nw:
				break
			if W[i] > val:
				ans2 += 1
				val = W[i]
			i += 1
		else:
			if j >= Nb:
				break
			if B[j] > val:
				ans2 += 1
				val = B[j]
			j += 1

	# print(ans1, ans2)

	print(max(ans1, ans2))


if __name__ == '__main__':
	main()