import java.util.Scanner;
 
class Main{
  public static void main(String[] arg){
    int H, W;

    Scanner in = new Scanner(System.in);

    while(true){
        H = in.nextInt();
        W = in.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