import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int H,W;
        while(sc.hasNextLine()){
            String[] str = sc.nextLine().split(" ");
            H = Integer.parseInt(str[0]);
            W = Integer.parseInt(str[1]);
            if(H == 0 && W == 0) break;
            for(int y = 0; y < H; y++){
                for(int x = 0;x < W; x++){
                    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) {
        Scanner sc = new Scanner(System.in);
        int H,W;
        while(sc.hasNextLine()){
            String[] str = sc.nextLine().split(" ");
            H = Integer.parseInt(str[0]);
            W = Integer.parseInt(str[1]);
            if(H == 0 && W == 0) break;
            for(int y = 0; y < H; y++){
                for(int x = 0;x < W; x++){
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        }
    }

} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int H,W;
        while(sc.hasNextLine()){
            String[] str = sc.nextLine().split(" ");
            H = Integer.parseInt(str[0]);
            W = Integer.parseInt(str[1]);
            if(H == 0 && W == 0) break;
            for(int y = 0; y < H; y++){
                for(int x = 0;x < W; x++){
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int H,W;
        while(sc.hasNextLine()){
            String[] str = sc.nextLine().split(" ");
            H = Integer.parseInt(str[0]);
            W = Integer.parseInt(str[1]);
            if(H == 0 && W == 0) break;
            for(int y = 0; y < H; y++){
                for(int x = 0;x < W; x++){
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int H H W; W while(sc.hasNextLine()){
            String[] str = sc.nextLine().split(" ");
            H = Integer.parseInt(str[0]);
            W = Integer.parseInt(str[1]);
            if(H == 0 && W == 0) break;
            for(int y = 0; y < H; y++){
                for(int x = 0;x < W; x++){
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        } sc.hasNextLine() sc.hasNextLine sc {
            String[] str = sc.nextLine().split(" ");
            H = Integer.parseInt(str[0]);
            W = Integer.parseInt(str[1]);
            if(H == 0 && W == 0) break;
            for(int y = 0; y < H; y++){
                for(int x = 0;x < W; x++){
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        } String[] str = sc.nextLine().split(" "); str sc.nextLine().split(" ") sc.nextLine().split sc.nextLine() sc.nextLine sc " " H = Integer.parseInt(str[0]) H Integer.parseInt(str[0]) Integer.parseInt Integer str[0] str 0 W = Integer.parseInt(str[1]) W Integer.parseInt(str[1]) Integer.parseInt Integer str[1] str 1 if(H == 0 && W == 0) break; H == 0 && W == 0 H == 0 H 0 W == 0 W 0 break; for(int y = 0; y < H; y++){
                for(int x = 0;x < W; x++){
                    System.out.print("#");
                }
                System.out.println();
            } int y = 0; int y = 0; y 0 y < H y H y++ y++ y {
                for(int x = 0;x < W; x++){
                    System.out.print("#");
                }
                System.out.println();
            } {
                for(int x = 0;x < W; x++){
                    System.out.print("#");
                }
                System.out.println();
            } for(int x = 0;x < W; x++){
                    System.out.print("#");
                } int x = 0; int x = 0; x 0 x < W x W x++ x++ x {
                    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) {
        Scanner sc = new Scanner(System.in);
        int H,W;
        while(sc.hasNextLine()){
            String[] str = sc.nextLine().split(" ");
            H = Integer.parseInt(str[0]);
            W = Integer.parseInt(str[1]);
            if(H == 0 && W == 0) break;
            for(int y = 0; y < H; y++){
                for(int x = 0;x < W; x++){
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        }
    }

} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int H,W;
        while(sc.hasNextLine()){
            String[] str = sc.nextLine().split(" ");
            H = Integer.parseInt(str[0]);
            W = Integer.parseInt(str[1]);
            if(H == 0 && W == 0) break;
            for(int y = 0; y < H; y++){
                for(int x = 0;x < W; x++){
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        }
    }

} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int H,W;
        while(sc.hasNextLine()){
            String[] str = sc.nextLine().split(" ");
            H = Integer.parseInt(str[0]);
            W = Integer.parseInt(str[1]);
            if(H == 0 && W == 0) break;
            for(int y = 0; y < H; y++){
                for(int x = 0;x < W; x++){
                    System.out.print("#");
                }
                System.out.println();
            }
            System.out.println();
        }
    }

}