func_code_string: #include <bits/stdc++.h>   using namespace std;   void sol() {     long long int n, k;     cin >> n >> k;     if (n == k)       cout << -1 <<   n ;     else {       long long int ar[n];       for (long long int i = 0; i < k; i++) {         ar[n - 1 - i] = n - i;       }       ar[n - 1 - k] = 1;       for (long long int i = 2; i <= n - k; i++) cout << i <<    ;       for (long long int i = n - 1 - k; i < n; i++) cout << ar[i] <<    ;     }   }   signed main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     long long int t = 1;     while (t--) {       sol();     }     return 0;   }   