백준 1764 파이썬 python : 듣보잡 @@황소처럼 우직하게@@ strip 을 일상화하자^^

import sys
input = sys.stdin.readline

n, m = map(int, input().split())

not_hear = []
not_see = []
for i in range(n):
    not_hear.append(input().strip())
for i in range(m):
    not_see.append(input().strip())

duplicated = set(not_hear) & set(not_see)
print(len(duplicated))
duplicated = sorted(list(duplicated))
for i in duplicated:
    print(i)

뭐 알고리즘 있을까 햇는데, 그냥 집합으로 구현. 그리고 strip 생활화^^