
import java.util.*;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner cin=new Scanner(System.in);
		
		while(true) {
			int H=cin.nextInt(),W=cin.nextInt();
			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.print("\n");
			}
			System.out.print("\n");
		}

	}

}


/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