import java.util.Scanner;
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    while(true){
      int h = sc.nextInt();
      int w = sc.nextInt();
      if(h == 0 && w == 0) return;
      for(int i = 0; i<h; i++) {
        for(int j = 0; 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