

import java.util.Scanner;

public class Main {
	public static void main(String[]args){
		//????????£????????????????????°?????????????????£?¨?
		Scanner sc = new Scanner(System.in);
		while(true){
			//???
			int H = sc.nextInt();
			//?¨?
			int W = sc.nextInt();
			//??\?????????0????????????
			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();
		}
	}
}
/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