#include <bits/stdc++.h>
int n, m, t;
int main() {
  scanf("%d%d", &n, &m);
  if (m == 3) {
    if (n == 3) {
      printf("0 0\n0 1\n1 0\n");
      return 0;
    }
    if (n == 4) {
      printf("0 0\n0 10\n10 0\n1 1\n");
      return 0;
    }
    printf("-1\n");
    return 0;
  } else {
    int cx(1), cy(1);
    printf("%d %d\n", -1, 0);
    for (int i = 2; i <= m; i++) printf("%d %d\n", cx++, cy), cy += i;
    cx = 10000000;
    for (int i = 1; i <= n - m; i++) printf("%d %d\n", cx, cy--), cx += i;
  }
  return 0;
}
