#include<iostream>

using namespace std;
int n = 0,A = 0,F = 0,blank=1;

int main(void) {

 cin >> n;
 while(n--)
 {
  cin >> A >> F;

  for (int f = 0; f < F; f++)
  {
   int i = 1, j = 1;

   if (blank == 0)cout << endl;

   for (i = 1; i <= A; i++)
   {
    for (j = 1; j <= i; j++)
    {
     cout << i;
    }
    cout << endl;
   }

   for (i = A - 1; i >= 1; i--)
   {
    for (int j = i; j >= 1; j--)
    {
     cout << i ;
    }  
    cout << endl;
   }
   blank = 0;
  }
 }
 system("PAUSE");
}