#include <iostream>
#include<cstdio>
#include<cmath>
#include<cstring>
#include<algorithm>
#include<cstdlib>

using namespace std;

int main()
{
    long int i,j,t,n,m,k;
    scanf("%ld", &t);
    //printf("\n");
    while(t--)
    {
        scanf("%ld %ld",&n,&k);
        while(k--)
        {
            for(i=1; i<=n; i++)
            {
                for(j=1; j<=i; j++)
                    printf("%d",i);
                printf("\n");
            }
            for(i=n-1; i>0; i--)
            {
                for(j=1; j<=i; j++)
                    printf("%d",i);
                printf("\n");
            }
            if(k!=0)
            printf("\n");
        }
	if(t!=0)
        printf("\n");
    }
    return 0;
}