func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int cnt[7];   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     long long int n, i, a, x;     bool test = true;     vector<pair<long long int, pair<long long int, long long int>>> v;     cin >> n;     for (i = 0; i < n; i++) {       cin >> a;       cnt[a]++;     }     x = n / 3;     if (cnt[1] + cnt[2] + cnt[3] + cnt[4] + cnt[6] != n) test = false;     if (cnt[1] == x && test) {       for (i = 1; i <= x; i++) {         if (cnt[4] > 0) {           if (cnt[2] > 0) {             v.push_back({1, {2, 4}});             cnt[2]--;             cnt[4]--;           } else {             test = false;             break;           }         } else if (cnt[3] > 0) {           if (cnt[6] > 0) {             v.push_back({1, {3, 6}});             cnt[3]--;             cnt[6]--;           } else {             test = false;             break;           }         } else if (cnt[2] > 0) {           if (cnt[6] > 0) {             v.push_back({1, {2, 6}});             cnt[2]--;             cnt[6]--;           } else {             test = false;             break;           }         }       }     } else       test = false;     if (test && cnt[2] == 0 && cnt[6] == 0 && cnt[3] == 0 && cnt[4] == 0) {       for (i = 0; i < v.size(); i++)         cout << v[i].first <<     << v[i].second.first <<                  << v[i].second.second << endl;     } else       cout <<  -1  << endl;     return 0;   }   