import java.awt.*;
import java.awt.geom.*;
import java.io.*;

import java.util.*;
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.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
	}
} import java.awt.*; awt.* java import java.awt.geom.*; geom.* java.awt import java.io.*; io.* java import java.util.*; util.* java 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.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
	}
} 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.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
	} main {
		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.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
	} Scanner sc = new Scanner(System.in); 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.print("#");
				}
				System.out.println();
			}
			System.out.println();
		} 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.print("#");
				}
				System.out.println();
			}
			System.out.println();
		} int h = sc.nextInt(); h sc.nextInt() sc.nextInt sc int w = sc.nextInt(); w sc.nextInt() sc.nextInt sc if(h == 0 && w == 0) break; h == 0 && w == 0 h == 0 h 0 w == 0 w 0 break; for(int i = 0; i < h; i++) {
				for(int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			} int i = 0; int i = 0; i 0 i < h i h i++ i++ i {
				for(int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			} {
				for(int j = 0; j < w; j++) {
					System.out.print("#");
				}
				System.out.println();
			} for(int j = 0; j < w; j++) {
					System.out.print("#");
				} int j = 0; int j = 0; j 0 j < w j w j++ j++ j {
					System.out.print("#");
				} {
					System.out.print("#");
				} System.out.print("#") System.out.print System.out System System.out "#" System.out.println() System.out.println System.out System System.out System.out.println() System.out.println System.out System System.out String[] args args
import java.awt.*;
import java.awt.geom.*;
import java.io.*;

import java.util.*;
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.print("#");
				}
				System.out.println();
			}
			System.out.println();
		}
	}
}