import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while (true) {
int H = sc.nextInt();
int W= sc.nextInt();
if (H == 0 && W == 0) {
break;
}
for(int i=0;i<H;i++){
for(int j=0;j<W;j++){
System.out.println("#");
}
System.out.println("\n");
}
System.out.println("\n");
}
}
}
}
