import java.util.Scanner;
class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);

        while(true){
            int h = in.nextInt();
            int w = in.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