import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		StringBuilder output = new StringBuilder();
		Scanner scan = new Scanner(System.in);
		while(true) {
			int H = scan.nextInt();
			int W = scan.nextInt();
		
			if (H == 0 && W == 0)
				break;
			
			for (int i = 0; i < H; i++) {
				for (int j = 0; j < W; j++) {
					output.append("#");
				}
				output.append('\n');
			}
			output.append('\n');
		}
		System.out.print(output);
	}

}
/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