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

public class Main {
	public static void main(String[] args) throws IOException {
		// ???????????\???
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String input = br.readLine();
		String str[] = input.split(" ");

		int h = Integer.parseInt(str[0]); // ??????
		int w = Integer.parseInt(str[1]); // ??????

		while (true) {
			if (h == 0 && w == 0) {
				//??¨??????0
				break;
			} else {
				//????????\???
				for (int i = 0; i < h; i++) {
					for (int j = 0; j < w; j++) {
						// ??????(#?????????)
						System.out.print("#");
					}
					// ??????(??????)
					System.out.println();
				}
				System.out.println();
				// ?¬??????\??????????????????
				input = br.readLine();
				str[0] = null;
				str[1] = null;
				str = input.split(" ");
				h = Integer.parseInt(str[0]);
				w = Integer.parseInt(str[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