import java.util.Scanner;
class Main{
public void yatary(){
    Scanner sc = new Scanner(System.in);
    int x,y,a,b;
    x = sc.nextInt();
    y = sc.nextInt();
    while(x!=0 || y!=0){
        for(a = 1; a <= x; a++){
            for(b = 1; b <= y; b++){
            System.out.print("#");
                if(b == y){
                    System.out.println();
                }
            }
        }
    System.out.println();
    x = sc.nextInt();
    y = sc.nextInt();
    }
}
public static void main(String[]args){
   new Main().yatary();
  }
}
/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