#include <bits/stdc++.h>
using namespace std;
template <class T>
inline T lowbit(T n) {
  return (n ^ (n - 1)) & n;
}
template <class T>
inline int countbit(T n) {
  return (n == 0) ? 0 : (1 + countbit(n & (n - 1)));
}
template <class T>
T gcd(T a, T b) {
  return b == 0 ? a : gcd(b, a % b);
}
template <typename T>
T lcm(T a, T b) {
  return a / gcd(a, b) * b;
}
template <class T>
T my_pow(T n, T p) {
  if (p == 0) return 1;
  T x = my_pow(n, p / 2);
  x = (x * x);
  if (p & 1) x = (x * n);
  return x;
}
template <class T>
T big_mod(T n, T p, T m) {
  if (p == 0) return (T)1;
  T x = big_mod(n, p / 2, m);
  x = (x * x) % m;
  if (p & 1) x = (x * n) % m;
  return x;
}
template <class T>
inline T Mod(T n, T m) {
  return (n % m + m) % m;
}
template <class T>
T multiplication(T n, T p, T m) {
  if (p == 0) return (T)0;
  T x = multiplication(n, p / 2, m);
  x = (x + x) % m;
  if (p & 1) x = (x + n) % m;
  return x;
}
bool isVowel(char ch) {
  ch = toupper(ch);
  if (ch == 'A' || ch == 'U' || ch == 'I' || ch == 'O' || ch == 'E')
    return true;
  return false;
}
template <class T>
T extract(string s, T ret) {
  stringstream ss(s);
  ss >> ret;
  return ret;
}
template <class T>
string toString(T n) {
  ostringstream ost;
  ost << n;
  ost.flush();
  return ost.str();
}
long long toInt(string s) {
  long long r = 0;
  istringstream sin(s);
  sin >> r;
  return r;
}
double toDouble(string s) {
  double r = 0;
  istringstream sin(s);
  sin >> r;
  return r;
}
const int mod = 1000000007;
long long a, b, n, m, res = 0, c = 0, t = 0, ans = 0, cc = 0, f = 0, ff = 0,
                      cnt = 0;
string s;
long long ar[100010], ar1[100100];
int main() {
  int t;
  cin >> t;
  while (t--) {
    cin >> a >> b;
    long long aa = 2 * a + b;
    for (int i = 1; i < a; i++) {
      for (int j = 1; j <= a; j++) {
        if (j + i > a) break;
        cout << i << " " << j + i << endl;
        aa--;
        if (aa == 0) break;
      }
      if (aa == 0) break;
    }
    for (int i = a; i >= 1; i--) {
      if (aa == 0) break;
      for (int j = 1; j < a; j++) {
        cout << i << " " << j << endl;
        aa--;
        if (aa == 0) break;
      }
      if (aa == 0) break;
    }
  }
  return 0;
}
