#include <bits/stdc++.h>
using namespace std;
const int INF = 100000000 - 1;
int n, m;
void zbuduj(int n, int m) {
  for (int i = 0; i < (m); ++i) {
    printf("%d %d\n", i - INF, i * i);
  }
  for (int i = 0; i < (n - m); ++i) {
    printf("%d %d\n", INF - i, i * i);
  }
}
int main() {
  scanf("%d%d", &n, &m);
  if (m > 3) {
    zbuduj(n, m);
    return 0;
  }
  if (m == 3) {
    if (n == 3) {
      zbuduj(3, 3);
      return 0;
    }
    if (n == 4) {
      printf("0 0\n3 0\n0 3\n1 1\n");
      return 0;
    }
    printf("-1\n");
  }
}
