func_code_string: #include <bits/stdc++.h>   using namespace std;   bool used[1005];   vector<int> v;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int n, k, a, b, c, d;     cin >> n >> k >> a >> b >> c >> d;     if (n == 4 or k <= n) {       cout << -1;       return 0;     }     used[a] = used[b] = used[c] = used[d] = true;     for (int i = 1; i <= n; i++) {       if (!used[i]) {         v.push_back(i);       }     }     cout << a <<     << c <<     << v[0] <<     << d <<    ;     for (int i = 1; i <= n - 5; i++) {       cout << v[i] <<    ;     }     cout << b <<   n ;     cout << c <<     << a <<     << v[0] <<     << b <<    ;     for (int i = n - 5; i >= 1; i--) {       cout << v[i] <<    ;     }     cout << d;     return 0;   }   