func_code_string: #include <iostream>   #include <algorithm>   #include <string>   using namespace std;   int main()   {    int t, n;    string s, b =  trygub ;    cin >> t;    while (t--)    {     int k = 0;     cin >> n >> s;     sort(s.begin(), s.end());     cout << s << endl;    }   }