import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        String line = br.readLine();

        while(line != null){            
            String[] input = line.split(" ");
            int height = Integer.valueOf(input[0]);
            int width = Integer.valueOf(input[1]);
            
            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.println();
            }
            
            System.out.println();
            line = br.readLine();
        }
    }
}
/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