import java.util.Scanner;

public class Main {

 public static void main(String[] args) {

  Scanner scanner = new Scanner(System.in);

  while (true) {

   int a = scanner.nextInt();

   int b = scanner.nextInt();

   if (a == 0 & b == 0)

    break;

   for (int i = 0; i < a; i++) {

    for (int j = 0; j < b; 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