
import java.util.Scanner;

public class Main {
	public static void main(String [] args){
		//????????£?????????????????????
		Scanner sc = new Scanner(System.in);

		//??°?????????
		while(true){
			//?????? H???????????????
			int H = sc.nextInt();
			//?????? W???????????????
			int W = sc.nextInt();
			//W??¨H???????????????0?????´?????????
			if(H == 0 && W == 0){
				break;
			}

			//??????????????¨???
			for(int i = 1;i <= H; i++){
				System.out.print('#');
				//??????????????¨???
				for(int j = 1; 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