import java.util.*;
import java.lang.StringBuilder;
public class Main {
	public static void main(String[] args) throws Exception{
		Scanner sc = new Scanner(System.in);
		StringBuilder bu = new StringBuilder();
		int h,w;
		while((h=sc.nextInt())!=0&&(w=sc.nextInt())!=0){
			for(int i=0;i<h;i++){
				for(int o=0;o<w;o++){
					bu.append("#");
				}
				bu.append("\n");
			}
			bu.append("\n");
		}
		System.out.print(bu);
	}
}
/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