#include <bits/stdc++.h>
using namespace std;
inline void read(int &a) {
  a = 0;
  int c = getchar(), b = 1;
  while (c > '9' || c < '0') {
    if (c == '-') b = -1;
    c = getchar();
  }
  while (c >= '0' && c <= '9') a = (a << 3) + (a << 1) + c - 48, c = getchar();
  a *= b;
}
inline int Rem() {
  int a = 0, c = getchar(), b = 1;
  while (c > '9' || c < '0') {
    if (c == '-') b = -1;
    c = getchar();
  }
  while (c >= '0' && c <= '9') a = (a << 3) + (a << 1) + c - 48, c = getchar();
  return a *= b;
}
inline void write(int x) {
  if (x > 9) write(x / 10);
  putchar('0' + x % 10);
}
inline void W(int x) {
  if (x < 0) {
    putchar('-'), x = -x;
  }
  write(x);
}
int n, m;
int main() {
  read(n), read(m);
  if (m == 3 && n > 4) {
    puts("-1");
    return 0;
  }
  for (int i = 1; i <= m; i++) {
    cout << i << " " << 1000000 + i * i << "\n";
  }
  for (int i = 1; i <= n - m; i++) {
    cout << i << " " << -1000000 - i * i << "\n";
  }
}
