import java.util.Scanner;
public class Main {
	void rect(){
		Scanner s = new Scanner(System.in);
		int h = s.nextInt();
		int w = s.nextInt();
		while(h!=0||w!=0){
			for(int i = 0;i<h;i++){
				for(int j = 0;j<w;j++){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
			h = s.nextInt();
			w = s.nextInt();
		}
	}
	public static void main(String args[]){
		Main m = new Main();
		m.rect();
	}
}
/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