func_code_string: #include <bits/stdc++.h>   using namespace std;   const int nmax = 110;   char s[nmax];   bool pal(int n) {     int i;     for (i = 0; i <= (n - 1) / 2; i++)       if (abs(s[i] - s[n - i - 1]) > 2 || abs(s[i] - s[n - i - 1]) == 1) return 0;     return 1;   }   int main() {     int t, n, i;     cin >> t;     for (i = 1; i <= t; i++) {       cin >> n >> s;       if (pal(n) == 1)         cout <<  YES  << endl;       else         cout <<  NO  << endl;     }     return 0;   }   