import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int i=0,j=0;
        while(true){
            int H=sc.nextInt();
            int W=sc.nextInt();
            if(H==0&&W==0)break;
            for(i=0;i<H;i++){
                for(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