import java.io.*;
import java.util.*;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			String[] sArray = br.readLine().split(" ");
			int h = Integer.parseInt(sArray[0]);
			int w = Integer.parseInt(sArray[1]);
			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.io.*; io.* java import java.util.*; util.* java public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			String[] sArray = br.readLine().split(" ");
			int h = Integer.parseInt(sArray[0]);
			int w = Integer.parseInt(sArray[1]);
			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) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			String[] sArray = br.readLine().split(" ");
			int h = Integer.parseInt(sArray[0]);
			int w = Integer.parseInt(sArray[1]);
			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 {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			String[] sArray = br.readLine().split(" ");
			int h = Integer.parseInt(sArray[0]);
			int w = Integer.parseInt(sArray[1]);
			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("");
		}
	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) while (true) {
			String[] sArray = br.readLine().split(" ");
			int h = Integer.parseInt(sArray[0]);
			int w = Integer.parseInt(sArray[1]);
			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 {
			String[] sArray = br.readLine().split(" ");
			int h = Integer.parseInt(sArray[0]);
			int w = Integer.parseInt(sArray[1]);
			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("");
		} String[] sArray = br.readLine().split(" "); sArray br.readLine().split(" ") br.readLine().split br.readLine() br.readLine br " " int h = Integer.parseInt(sArray[0]); h Integer.parseInt(sArray[0]) Integer.parseInt Integer sArray[0] sArray 0 int w = Integer.parseInt(sArray[1]); w Integer.parseInt(sArray[1]) Integer.parseInt Integer sArray[1] sArray 1 if (h == 0 & w == 0) {
				break;
			} h == 0 & w == 0 h == 0 h 0 w == 0 w 0 {
				break;
			} 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 public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			String[] sArray = br.readLine().split(" ");
			int h = Integer.parseInt(sArray[0]);
			int w = Integer.parseInt(sArray[1]);
			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("");
		}
	}
} public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			String[] sArray = br.readLine().split(" ");
			int h = Integer.parseInt(sArray[0]);
			int w = Integer.parseInt(sArray[1]);
			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
import java.io.*;
import java.util.*;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		while (true) {
			String[] sArray = br.readLine().split(" ");
			int h = Integer.parseInt(sArray[0]);
			int w = Integer.parseInt(sArray[1]);
			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("");
		}
	}
}