import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner( System.in );
		
		while( true ) {
			int height	= sc.nextInt();
			int width	= sc.nextInt();
			
			if (		height	== 0
					&&	width	== 0	) {
				break;
			}
			
			for (int i = 0; i < height; i++ ) {
				for ( int j = 0; j < width; j++ ) {
					System.out.print("#");
				}
				System.out.print("\n");
			}
			System.out.print("\n");
			
		}
	}
}
/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