uva 488

/************************
This is a problem that exams your  understand for "for control",i think
2013/10/12
yuzibode@126.com
**********************/
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
  // ifstream cin("in.txt");
  int d,i,c,n,a,b,w;//TMD my var is too many!
  cin>>d;
  for(w=0;w<d;w++)//the number of blocks
    {   
      
	
      cin>>n>>b;
  //b is Frequency
       for(a=0;a<b;a++)
        {
	  //n is Ampliitude
           for(i=1;i<=n;i++)
             {   
	       if(i==1&&a==0)
		 ;
	       else 
               cout<<endl;
             for(c=i;c>=1;c--)
               cout<<i;
             }
           for(i=i-2;i>=1;i--)
             {
               cout<<endl;
              for(c=i;c>=1;c--)
	        cout<<i;
              }
	               cout<<endl;
	    
        }
       if(w==d-1)
	 ;
       else 
       cout<<endl;
      
    }
 
  return 0;
}