#include <bits/stdc++.h>   using namespace std;   int main() {     int i, j, n, m, q, p;     cin >> q;     while (q--) {       cin >> n;       string s;       cin >> s;       p = 0;       if (s.length() > 2) {         cout <<  YES n2 n ;         cout << s[0] <<    ;         for (i = 1; i < n; i++) cout << s[i];         cout << endl;       } else {         if (s[0] < s[1])           cout <<  YES n2 n  << s[0] <<     << s[1] << endl;         else           cout <<  NO  << endl;       }     }     return 0;   }   