import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

    	int H = 0;
    	int W = 0;

    	Scanner sc= new Scanner(System.in);

    	while( true ) {
    		H = sc.nextInt();
    		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.print( '#' );
    			}
    			System.out.print( "\n" );
    		}
    		System.out.print( "\n" );
    	}
    	sc.close();
    }
}

/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