题解 | 字符串字符匹配

import sys

a = input()
b = input()
a_s = set(a)
b_s = set(b)
for _ in a_s:
    if _ not in b_s:
        print("false")
        exit(0)
print("true")

set 做下hash 然后判断a 哈希是不是都在b哈希里面