import java.util.Scanner;

public class Main{
	public static void main(String[] args){
		Scanner in = new Scanner(System.in);
		int H,W;
		
		H = in.nextInt();
		W = in.nextInt();
		
		while(H!=0 || W!=0){
			/*
			char[][] sharps = new char[H][W];
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					sharps[i][j] = '#';
				}
			}
			*/
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					System.out.print('#');
				}
				System.out.println();
			}
			System.out.println();
			H = in.nextInt();
			W = in.nextInt();
		}
	}
}
/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