import java.io.IOException;
import java.util.Scanner;
public class Main {
	public static void main(String[] args) throws IOException{
		Scanner sc = new Scanner(System.in);

		while(true) {
			int H = sc.nextInt();
			int 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();
		}

		sc.close();
	}
}

/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