#include <bits/stdc++.h>   using namespace std;   int ar[1000001];   int main() {     int n, k;     cin >> n >> k;     if (k == n) {       cout << -1 << endl;       return 0;     }     if (k == n - 1) {       for (int i = 0; i < n; i++) cout << i + 1 <<    ;       cout << endl;       return 0;     }     for (int i = 2; i <= k + 1; i++) ar[i] = i;     ar[1] = k + 2;     ar[n] = 1;     for (int i = k + 2; i < n; i++) ar[i] = i + 1;     for (int i = 1; i <= n; i++) cout << ar[i] <<    ;     cout << endl;     return 0;   }   