import java.util.Scanner;
public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
			for(i = 1; i <= h; ++i){
				for(v = 1; v <= w; ++v){
					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