func_code_string: #include <bits/stdc++.h>   using namespace std;   bool Check(char x) {     if (x <=  3  && x >=  1 )       return true;     else       return false;   }   int main() {     char s[1000];     cin >> s;     char x;     for (int i = 0; i < strlen(s); ++i) {       for (int j = i + 1; j < strlen(s); ++j) {         if (s[j] < s[i] && Check(s[i]) && Check(s[j])) {           x = s[i];           s[i] = s[j];           s[j] = x;         }       }     }     for (int i = 0; i < strlen(s); i++) {       cout << s[i];     }     return 0;   }   