import java.io.*;

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


			while(true){
			String[] line = br.readLine().split(" ");
			int H =Integer.parseInt(line[0]);
			int W =Integer.parseInt(line[1]);
				if(H == 0 && W == 0) break;
				for(int a = 1; a <=H; a++){
					for(int i = 1;i <= W;i++){
						System.out.print("#");
					}
					System.out.print("\n");
				}
				System.out.print("\n");
			}	
		} catch(Exception e){
		}
	}
}
/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