func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long n, k;     cin >> n >> k;     if (k < n / 2) {       cout << -1;       return 0;     }     if (n == 1) {       if (k)         cout << -1;       else         cout << 1;       return 0;     }     int x = k - (n - 2) / 2;     cout << x <<     << 2 * x <<    ;     for (int i = 2, j = 2 * x + 1; i < n; i++, j++) cout << j <<    ;     return 0;   }   