

import java.util.*;

public class Main {
	public static void main(String args[]) {
		Scanner scan = new Scanner(System.in);
		StringBuilder sb = new StringBuilder();
		sb.append("");//??????????????\???????????????
		int h, w;
		
		// h??¨w?????¨??????0????????£?????¨??????????????????????????????
		while (true) {
			h = scan.nextInt();// ????????????
			w = scan.nextInt();// ?¨??????????
			
			if((h == 0) & (w == 0)){break;}

			// for?????§????????????h??§????????????
			for (int count = 0; count < h; count++) {
				// for?????§?¨???????????????§????????????
				for (int count2 = 0; count2 < w; count2++) {
					// #???StringBuilder?????\????????????
					sb.append("#");
				}
				sb.append("\n");
			}
			System.out.println(new String(sb));
			//StringBuilder????????????????????????
			sb.delete(0, sb.length());
		}
		

	}
}
/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