import java.util.Scanner;
class Main{
	Scanner sc = new Scanner(System.in);
	int H;
	int W;
	
	void sp1(){
		while(true){
			H = sc.nextInt();
			W = sc.nextInt();
			if(H==0 && W==0)break;
	
			for(int i=0; i<H; i++){
				
			
				for(int j=0; j<W; j++){
					System.out.print("#");
					
				}
				System.out.println();

			}	
			System.out.println();
		}
	}
	
	
		public static void main(String[]agrs){
			new Main().sp1();
		}
	}
		
/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