문제
풀이
#include <iostream>
#include <set>
#include <string>
using namespace std;
void solve(void) {
string a; cin >> a;
char b; set<char> s;
while (cin >> b) s.insert(b);
for (char c : a) {
cout << (s.count(c) && c >= 'A' && c <= 'Z' ? (char)(c-'A'+'a') : c);
}
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
solve();
return 0;
}