func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     while (n--) {       string s, t;       cin >> s >> t;       std::map<char, bool> ms, mt;       for (int i = 0; i < s.size(); i++) {         ms[s[i]] = true;         mt[t[i]] = true;       }       for (char x =  a ; x <=  z ; x++)         if (ms[x] && mt[x]) {           cout <<  YES ;           goto flag;         }       cout <<  NO ;     flag:       cout << endl;       ;     }   }   