import java.io.*;

class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] array = br.readLine().split(" ");
        int H = Integer.parseInt(array[0]);
        int W = Integer.parseInt(array[1]);
		while(H!=0&&W!=0){
			for(int i=0;i<H;i++){
				for(int j=0;j<W;j++){
					System.out.print("#");
				}
				System.out.println("");
			}
			System.out.println("");
			array = br.readLine().split(" ");
	        H = Integer.parseInt(array[0]);
	        W = Integer.parseInt(array[1]);
		}
	}
}
/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