func_code_string: #include <bits/stdc++.h>   using namespace std;   unsigned long long int gcd(unsigned long long int a, unsigned long long int b) {     unsigned long long int max = a > b ? a : b;     unsigned long long int min = a < b ? a : b;     if (max % min == 0) return min;     if (max % min == 1) return 1;     return gcd(min, max % min);   }   int main() {     int flag = 0;     unsigned long long int l, r;     cin >> l >> r;     if (l - r < 2) {       cout <<  -1 ;       return 0;     }     unsigned long long int i, j, k;     for (i = l; i <= r - 2; i++) {       for (j = i + 1; j <= r - 1; j++) {         if (gcd(i, j) == 1) {           for (k = j + 1; k <= r; k++) {             if (gcd(j, k) == 1 && gcd(i, k) != 1) {               flag = 1;               cout << i <<     << j <<     << k;               break;             }           }         }         if (flag == 1) break;       }       if (flag == 1) break;     }     if (flag == 0) cout <<  -1 ;     return 0;   }   