import java.util.Scanner;

public class Main {

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

    private static void solve(Scanner in) {
        for (int H = in.nextInt(), W = in.nextInt(); 
                H != 0 || W != 0; 
                H = in.nextInt(), W = in.nextInt()) {
            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.util.Scanner; Scanner java.util public class Main {

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

    private static void solve(Scanner in) {
        for (int H = in.nextInt(), W = in.nextInt(); 
                H != 0 || W != 0; 
                H = in.nextInt(), W = in.nextInt()) {
            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) {
        try (Scanner in = new Scanner(System.in)) {
            solve(in);
        }
    } main {
        try (Scanner in = new Scanner(System.in)) {
            solve(in);
        }
    } try (Scanner in = new Scanner(System.in)) {
            solve(in);
        } {
            solve(in);
        } Scanner in = new Scanner(System.in) Scanner in = new Scanner(System.in) new Scanner(System.in) solve(in) solve in String[] args args private static void solve(Scanner in) {
        for (int H = in.nextInt(), W = in.nextInt(); 
                H != 0 || W != 0; 
                H = in.nextInt(), W = in.nextInt()) {
            for (int i = 0; i < H; i++) {
                for (int j = 0; j < W; j++) {
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        }
    } solve {
        for (int H = in.nextInt(), W = in.nextInt(); 
                H != 0 || W != 0; 
                H = in.nextInt(), W = in.nextInt()) {
            for (int i = 0; i < H; i++) {
                for (int j = 0; j < W; j++) {
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        }
    } for (int H = in.nextInt(), W = in.nextInt(); 
                H != 0 || W != 0; 
                H = in.nextInt(), W = in.nextInt()) {
            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 = in.nextInt(), W = in.nextInt(); int H = in.nextInt() H in.nextInt() in.nextInt in W = in.nextInt(); W in.nextInt() in.nextInt in H != 0 || W != 0 H != 0 H 0 W != 0 W 0 H = in.nextInt(), W = in.nextInt() H = in.nextInt() H in.nextInt() in.nextInt in W = in.nextInt() W in.nextInt() in.nextInt in {
            for (int i = 0; i < H; i++) {
                for (int j = 0; j < W; j++) {
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        } {
            for (int i = 0; i < H; i++) {
                for (int j = 0; j < W; j++) {
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        } 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 Scanner in in public class Main {

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

    private static void solve(Scanner in) {
        for (int H = in.nextInt(), W = in.nextInt(); 
                H != 0 || W != 0; 
                H = in.nextInt(), W = in.nextInt()) {
            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) {
        try (Scanner in = new Scanner(System.in)) {
            solve(in);
        }
    }

    private static void solve(Scanner in) {
        for (int H = in.nextInt(), W = in.nextInt(); 
                H != 0 || W != 0; 
                H = in.nextInt(), W = in.nextInt()) {
            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.util.Scanner;

public class Main {

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

    private static void solve(Scanner in) {
        for (int H = in.nextInt(), W = in.nextInt(); 
                H != 0 || W != 0; 
                H = in.nextInt(), W = in.nextInt()) {
            for (int i = 0; i < H; i++) {
                for (int j = 0; j < W; j++) {
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        }
    }
}