func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     string ss, tt;     cin >> ss >> tt;     int l = ss.size();     vector<int> s(30);     vector<int> t(30);     for (int i = 0; i < l; i++) {       s[ss[i] -  a ]++;       t[tt[i] -  a ]++;     }     bool ok = false;     for (int i = 0; i < s.size(); i++) {       if (s[i] && t[i]) {         ok = true;       }     }     cout << (ok ?  YES n  :  NO n );     return;   }   int main() {     int q;     cin >> q;     while (q--) {       solve();     }   }   