import java.io.*;

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