func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string s;     cin >> s;     int sl = s.length();     pair<int, int> a[26] = {};     for (int i = 0; i < 26; i++) a[i].second = i +  a ;     for (int i = 0; i < sl; i++) a[s[i] -  a ].first++;     sort(a, a + 26, greater<pair<int, int> >());     string ans(sl,  ? );     bool valid = false;     for (int i = 1; i < sl / 2; i++) ans[i] = a[0].second, a[0].first--;     for (int i = sl / 2; i < sl; i++) {       int sq = sqrt(i + 1);       bool ok = false;       for (int j = 2; j <= sq; j++) ok |= ((i + 1) % j == 0);       if (ok) ans[i] = a[0].second, a[0].first--;     }     if (a[0].first >= 0) {       string rem =   ;       for (int i = 0; i < 26; i++)         while (a[i].first--) rem.push_back(a[i].second);       for (int i = 0, j = 0; i < sl; i++)         if (ans[i] ==  ? ) {           ans[i] = rem[j];           j++;         }       valid = true;     }     if (valid == false)       cout <<  NO n ;     else       cout <<  YES n  << ans <<   n ;     return 0;   }   