import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int i=0,j=0;
        while(true){
            int H=sc.nextInt();
            int W=sc.nextInt();
            if(H==0&&W==0)break;
            for(i=0;i<H;i++){
                for(j=0;j<W;j++){
                    System.out.print("#");
                }
                System.out.print("\n");
        }
System.out.print("\n");
    }
}
} import java.util.Scanner; Scanner java.util public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int i=0,j=0;
        while(true){
            int H=sc.nextInt();
            int W=sc.nextInt();
            if(H==0&&W==0)break;
            for(i=0;i<H;i++){
                for(j=0;j<W;j++){
                    System.out.print("#");
                }
                System.out.print("\n");
        }
System.out.print("\n");
    }
}
} Main public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int i=0,j=0;
        while(true){
            int H=sc.nextInt();
            int W=sc.nextInt();
            if(H==0&&W==0)break;
            for(i=0;i<H;i++){
                for(j=0;j<W;j++){
                    System.out.print("#");
                }
                System.out.print("\n");
        }
System.out.print("\n");
    }
} main {
        Scanner sc=new Scanner(System.in);
        int i=0,j=0;
        while(true){
            int H=sc.nextInt();
            int W=sc.nextInt();
            if(H==0&&W==0)break;
            for(i=0;i<H;i++){
                for(j=0;j<W;j++){
                    System.out.print("#");
                }
                System.out.print("\n");
        }
System.out.print("\n");
    }
} Scanner sc=new Scanner(System.in); sc new Scanner(System.in) int i=0 i 0 j=0; j 0 while(true){
            int H=sc.nextInt();
            int W=sc.nextInt();
            if(H==0&&W==0)break;
            for(i=0;i<H;i++){
                for(j=0;j<W;j++){
                    System.out.print("#");
                }
                System.out.print("\n");
        }
System.out.print("\n");
    } true {
            int H=sc.nextInt();
            int W=sc.nextInt();
            if(H==0&&W==0)break;
            for(i=0;i<H;i++){
                for(j=0;j<W;j++){
                    System.out.print("#");
                }
                System.out.print("\n");
        }
System.out.print("\n");
    } int H=sc.nextInt(); H sc.nextInt() sc.nextInt sc int W=sc.nextInt(); W sc.nextInt() sc.nextInt sc if(H==0&&W==0)break; H==0&&W==0 H==0 H 0 W==0 W 0 break; for(i=0;i<H;i++){
                for(j=0;j<W;j++){
                    System.out.print("#");
                }
                System.out.print("\n");
        } i=0; i=0 i 0 i<H i H i++ i++ i {
                for(j=0;j<W;j++){
                    System.out.print("#");
                }
                System.out.print("\n");
        } {
                for(j=0;j<W;j++){
                    System.out.print("#");
                }
                System.out.print("\n");
        } for(j=0;j<W;j++){
                    System.out.print("#");
                } j=0; 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.print("\n") System.out.print System.out System System.out "\n" 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 sc=new Scanner(System.in);
        int i=0,j=0;
        while(true){
            int H=sc.nextInt();
            int W=sc.nextInt();
            if(H==0&&W==0)break;
            for(i=0;i<H;i++){
                for(j=0;j<W;j++){
                    System.out.print("#");
                }
                System.out.print("\n");
        }
System.out.print("\n");
    }
}
} public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int i=0,j=0;
        while(true){
            int H=sc.nextInt();
            int W=sc.nextInt();
            if(H==0&&W==0)break;
            for(i=0;i<H;i++){
                for(j=0;j<W;j++){
                    System.out.print("#");
                }
                System.out.print("\n");
        }
System.out.print("\n");
    }
}
} Main
import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int i=0,j=0;
        while(true){
            int H=sc.nextInt();
            int W=sc.nextInt();
            if(H==0&&W==0)break;
            for(i=0;i<H;i++){
                for(j=0;j<W;j++){
                    System.out.print("#");
                }
                System.out.print("\n");
        }
System.out.print("\n");
    }
}
}
