import java.util.Scanner;

/**
 *
 * @author lenovo
 */
public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            int h = scanner.nextInt();
            int w = scanner.nextInt();
            for (int j = 0; j < h; j++) {
                String s = "";
                for (int i = 0; i < w; i++) {

                    s = s + "#";
                }
                System.out.println(s);
             
            }
            if (h == 0 || w == 0) {
                break;
            }
     System.out.print("\n");
        }
      
    }

} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            int h = scanner.nextInt();
            int w = scanner.nextInt();
            for (int j = 0; j < h; j++) {
                String s = "";
                for (int i = 0; i < w; i++) {

                    s = s + "#";
                }
                System.out.println(s);
             
            }
            if (h == 0 || w == 0) {
                break;
            }
     System.out.print("\n");
        }
      
    }

} Main public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            int h = scanner.nextInt();
            int w = scanner.nextInt();
            for (int j = 0; j < h; j++) {
                String s = "";
                for (int i = 0; i < w; i++) {

                    s = s + "#";
                }
                System.out.println(s);
             
            }
            if (h == 0 || w == 0) {
                break;
            }
     System.out.print("\n");
        }
      
    } main {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            int h = scanner.nextInt();
            int w = scanner.nextInt();
            for (int j = 0; j < h; j++) {
                String s = "";
                for (int i = 0; i < w; i++) {

                    s = s + "#";
                }
                System.out.println(s);
             
            }
            if (h == 0 || w == 0) {
                break;
            }
     System.out.print("\n");
        }
      
    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) while (true) {
            int h = scanner.nextInt();
            int w = scanner.nextInt();
            for (int j = 0; j < h; j++) {
                String s = "";
                for (int i = 0; i < w; i++) {

                    s = s + "#";
                }
                System.out.println(s);
             
            }
            if (h == 0 || w == 0) {
                break;
            }
     System.out.print("\n");
        } true {
            int h = scanner.nextInt();
            int w = scanner.nextInt();
            for (int j = 0; j < h; j++) {
                String s = "";
                for (int i = 0; i < w; i++) {

                    s = s + "#";
                }
                System.out.println(s);
             
            }
            if (h == 0 || w == 0) {
                break;
            }
     System.out.print("\n");
        } int h = scanner.nextInt(); h scanner.nextInt() scanner.nextInt scanner int w = scanner.nextInt(); w scanner.nextInt() scanner.nextInt scanner for (int j = 0; j < h; j++) {
                String s = "";
                for (int i = 0; i < w; i++) {

                    s = s + "#";
                }
                System.out.println(s);
             
            } int j = 0; int j = 0; j 0 j < h j h j++ j++ j {
                String s = "";
                for (int i = 0; i < w; i++) {

                    s = s + "#";
                }
                System.out.println(s);
             
            } {
                String s = "";
                for (int i = 0; i < w; i++) {

                    s = s + "#";
                }
                System.out.println(s);
             
            } String s = ""; s "" for (int i = 0; i < w; i++) {

                    s = s + "#";
                } int i = 0; int i = 0; i 0 i < w i w i++ i++ i {

                    s = s + "#";
                } {

                    s = s + "#";
                } s = s + "#" s s + "#" s "#" System.out.println(s) System.out.println System.out System System.out s if (h == 0 || w == 0) {
                break;
            } h == 0 || w == 0 h == 0 h 0 w == 0 w 0 {
                break;
            } break; System.out.print("\n") System.out.print System.out System System.out "\n" String[] args args public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            int h = scanner.nextInt();
            int w = scanner.nextInt();
            for (int j = 0; j < h; j++) {
                String s = "";
                for (int i = 0; i < w; i++) {

                    s = s + "#";
                }
                System.out.println(s);
             
            }
            if (h == 0 || w == 0) {
                break;
            }
     System.out.print("\n");
        }
      
    }

} public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            int h = scanner.nextInt();
            int w = scanner.nextInt();
            for (int j = 0; j < h; j++) {
                String s = "";
                for (int i = 0; i < w; i++) {

                    s = s + "#";
                }
                System.out.println(s);
             
            }
            if (h == 0 || w == 0) {
                break;
            }
     System.out.print("\n");
        }
      
    }

} Main
import java.util.Scanner;

/**
 *
 * @author lenovo
 */
public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            int h = scanner.nextInt();
            int w = scanner.nextInt();
            for (int j = 0; j < h; j++) {
                String s = "";
                for (int i = 0; i < w; i++) {

                    s = s + "#";
                }
                System.out.println(s);
             
            }
            if (h == 0 || w == 0) {
                break;
            }
     System.out.print("\n");
        }
      
    }

}