import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main {
	public static void main(String[] args) throws IOException{
		int h,w;
		String[] str;

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder builder = new StringBuilder();

		while(true){
			str = br.readLine().split(" ");
			h = Integer.parseInt(str[0]);
			w = Integer.parseInt(str[1]);

			if(h==0 && w==0)break;

			for(int i = 0; i < h; i++){
				for(int j = 0; j < w; j++){
					builder.append("#");
				}
				builder.append("\n");
			}
			builder.append("\n");
		}
		builder.delete(builder.length() - 1, builder.length());

		System.out.println(builder.toString());
		br.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