#include<iostream>
//#include<conio.h>
#include<stdio.h>
#include<stdlib.h>
using namespace std;
int printwave(long int amp);
int main()
{
long int a,f,i,nline=0,t,k;
cin>>t;
for(k=1;k<=t;k++)
{
scanf("%ld%ld",&a,&f);
for(i=1;i<=f;i++)
{
if(nline)cout<<endl;
printwave(a);
nline=1;
}
}
// getch();
exit(0);
}
int printwave(long int amp)
{
long int i,j;
for(i=1;i<=amp;i++)
{
for(j=1;j<=i;j++)
cout<<i;
cout<<endl;
}
for(i=amp-1;i>=1;i--)
{
for(j=1;j<=i;j++)
cout<<i;
cout<<endl;
}
return 0;
}
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