#include<bits/stdc++.h>
using namespace std;
char a[300][300];
int main()
{
int h,w,i,j;
while(cin>>h>>w)
{
if(h==0 || w==0)
break;
for(i=0;i<h;i++)
{
for(j=0;j<w;j++)
cout<<"#";
cout<<"\n";
}
}
return 0;
}
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