#include <iostream>
using namespace std;
int main ()
{
 int m,e,cases;
 cin>>cases;
 for (int i=0;i<cases; i++)
 {


  cin>>m>>e;
  for (int j=0;j<e; j++)
  {

   cout<<endl;

   for (int k=1;k<=m; k++)
   {
    for (int l = 1; l <= k; l++)
    {
     cout<<k;
    }
   
   }
   for (int k=m-1;k>=1;k--)
   {
    for (int l = 1; l <= k; l++)
    {
     cout<<k;
    }
    cout<<endl;
   }

  }
 }
 return 0;
}