import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		
		while(true){
			int H = s.nextInt();
			int W = s.nextInt();
			if(H==0 && W==0){
				break;
			}
			
			for(int i=1; i<=H; i++){
				for(int j=1; j<=W; j++){
					System.out.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
		s.close();
	}

}
/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