import java.util.Scanner;

class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        do {
            int h = sc.nextInt();
            int l = sc.nextInt();

            if (h == 0 && l == 0) {
                break;
            } else {

                for (int i = 0; i < h; i++) {
                    for (int j = 0; j < l; j++) {
                        System.out.print('#');
                    }
                    System.out.println();
                }

                System.out.println();
            }

        } while (true);
    }

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

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        do {
            int h = sc.nextInt();
            int l = sc.nextInt();

            if (h == 0 && l == 0) {
                break;
            } else {

                for (int i = 0; i < h; i++) {
                    for (int j = 0; j < l; j++) {
                        System.out.print('#');
                    }
                    System.out.println();
                }

                System.out.println();
            }

        } while (true);
    }

} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        do {
            int h = sc.nextInt();
            int l = sc.nextInt();

            if (h == 0 && l == 0) {
                break;
            } else {

                for (int i = 0; i < h; i++) {
                    for (int j = 0; j < l; j++) {
                        System.out.print('#');
                    }
                    System.out.println();
                }

                System.out.println();
            }

        } while (true);
    } main {
        Scanner sc = new Scanner(System.in);

        do {
            int h = sc.nextInt();
            int l = sc.nextInt();

            if (h == 0 && l == 0) {
                break;
            } else {

                for (int i = 0; i < h; i++) {
                    for (int j = 0; j < l; j++) {
                        System.out.print('#');
                    }
                    System.out.println();
                }

                System.out.println();
            }

        } while (true);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) do {
            int h = sc.nextInt();
            int l = sc.nextInt();

            if (h == 0 && l == 0) {
                break;
            } else {

                for (int i = 0; i < h; i++) {
                    for (int j = 0; j < l; j++) {
                        System.out.print('#');
                    }
                    System.out.println();
                }

                System.out.println();
            }

        } while (true); true {
            int h = sc.nextInt();
            int l = sc.nextInt();

            if (h == 0 && l == 0) {
                break;
            } else {

                for (int i = 0; i < h; i++) {
                    for (int j = 0; j < l; j++) {
                        System.out.print('#');
                    }
                    System.out.println();
                }

                System.out.println();
            }

        } int h = sc.nextInt(); h sc.nextInt() sc.nextInt sc int l = sc.nextInt(); l sc.nextInt() sc.nextInt sc if (h == 0 && l == 0) {
                break;
            } else {

                for (int i = 0; i < h; i++) {
                    for (int j = 0; j < l; j++) {
                        System.out.print('#');
                    }
                    System.out.println();
                }

                System.out.println();
            } h == 0 && l == 0 h == 0 h 0 l == 0 l 0 {
                break;
            } break; {

                for (int i = 0; i < h; i++) {
                    for (int j = 0; j < l; j++) {
                        System.out.print('#');
                    }
                    System.out.println();
                }

                System.out.println();
            } for (int i = 0; i < h; i++) {
                    for (int j = 0; j < l; 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 < l; j++) {
                        System.out.print('#');
                    }
                    System.out.println();
                } {
                    for (int j = 0; j < l; j++) {
                        System.out.print('#');
                    }
                    System.out.println();
                } for (int j = 0; j < l; j++) {
                        System.out.print('#');
                    } int j = 0; int j = 0; j 0 j < l j l 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.util.Scanner;

class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        do {
            int h = sc.nextInt();
            int l = sc.nextInt();

            if (h == 0 && l == 0) {
                break;
            } else {

                for (int i = 0; i < h; i++) {
                    for (int j = 0; j < l; j++) {
                        System.out.print('#');
                    }
                    System.out.println();
                }

                System.out.println();
            }

        } while (true);
    }

}