import java.util.Scanner;
class Main{
public static void main(String[] args){
Scanner scan=new Scanner(System.in);
while(true){
int A=scan.nextInt();
int B=scan.nextInt();
if(A==0&&B==0)
break;
for(int a=0;a<A;a++){
for(int b=0;b<B;b++){
System.out.print("#");
}
System.out.println();
}
System.out.println();
}
}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz