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();
		if( H==0&& W==0) {
			break;
		}
		for(int a=0;a<H;a++) {
			for(int b=0;b<W;b++) {
				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