import java.util.Scanner;
public class Main{
    public static void main(String args[]){
        int i,a,b;
        int[] m,n;
        m = new int[100];
        n = new int[100];
        Scanner scan = new Scanner(System.in);
        for(i=0;i<100;i++){
            m[i] = scan.nextInt();
            n[i] = scan.nextInt();
            if(m[i]==0 && n[i]==0) break;
        }
        for(i=0;i<100;i++){
            if(m[i]==0 && n[i]==0) break;
            for(a=0;a<m[i];a++){
                for(b=0;b<n[i];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