import java.io.IOException;
import java.util.Scanner;
public class Main {

	public static void main(String[] args) throws Exception {
		// TODO ?????????????????????????????????????????????
	   int a,b,c,d,e;
	   a=1;b=1;e=1;
       Scanner sc = new Scanner(System.in);
       while (a!=0 || b!=0){
       a = sc.nextInt();
       b = sc.nextInt();
       c = 1;
       d = 1;
       if (e != 1){
    	   System.out.println();
       }
       while(c<=a){
    	   while(d<=b){
    		   if(d!=b){
    			   System.out.print("#");
    		   }else{
    			   System.out.println("#");
    		   }
    		   d = d+1;
    	   }
    	   c = c+1;
    	   d = 1;
       }
       e=e+1;
       }
	}

}
/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