import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner stdin = new Scanner(System.in);
        
        int h;
        int w;
        
        while(true){
            h = stdin.nextInt();
            w = stdin.nextInt();
            if(h == 0 && w == 0)break;
            if(h <= 300 && w <= 300){
                for(int i = 0; i < h; i++){
                    for(int j = 0; j < w; j++){
                        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