import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int H =0;
    int W =0;
    while(true){
     H = sc.nextInt();
     W = sc.nextInt();

//  System.out.println("");
   if(H != 0 && W != 0){
    for(int i = 0; i < H ; i++){
      for(int j = 0; j < W ; j++){
        System.out.print("#");
      }
      System.out.print("\n");
    }
    System.out.println("");
  }else{
    return;
  }

}
//  sc.close();
  //System.exit(0);

  }

}

/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