		import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
StringBuilder sb=new StringBuilder("");
		int H=sc.nextInt(),W=sc.nextInt();
		while (H!=0 || W!=0){
			for (int m=1;m<=W;m++){
			sb.append("#");}
		for (int n=1;n<=H;n++){System.out.println(sb);}
			System.out.println();
			sb.delete(0,W);
			H=sc.nextInt();W=sc.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