import java.util.*;
 
class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
 
    label:
    while(sc.hasNextLine()){
      int h = sc.nextInt();
      int w = sc.nextInt();
       
      if(h==0 && w==0) break label;
      for(int j = 1; j<=h; j++){
        for(int i = 1; i<=w; i++){
          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