https://www.acmicpc.net/problem/14425
import sys
n, m=map(int, sys.stdin.readline().split())
mlist=dict()
for i in range(n):
s=sys.stdin.readline().strip()
mlist[s]=True
cnt=0
for _ in range(m):
word=sys.stdin.readline().strip()
if word in mlist.keys():
cnt+=1
print(cnt)
import sys
n, m=map(int, sys.stdin.readline().split())
mlist=[]
for i in range(n):
mlist.append(sys.stdin.readline().strip())
cnt=0
for i in range(m):
word=sys.stdin.readline().strip()
for j in range(n):
if word==mlist[j]:
cnt+=1
continue
print(cnt)