func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     int q;     cin >> q;     for (int k = 0; k < q; ++k) {       string s, t;       cin >> s >> t;       vector<bool> a(26), b(26);       for (int i = 0; i < s.size(); ++i) {         a[s[i] -  a ] = true;         b[t[i] -  a ] = true;       }       bool flag = false;       for (int i = 0; i < 26; ++i) {         if (a[i] && b[i]) {           flag = true;           break;         }       }       if (flag)         cout <<  YES n ;       else         cout <<  NO n ;     }     return 0;   }   