#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param jewels string字符串 
# @param stones string字符串 
# @return int整型
#
class Solution:
    def numJewelsInStones(self , jewels: str, stones: str) -> int:
        # write code here
        ans = 0
        for c in stones:
            if c in jewels:
                ans += 1
        return ans