import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;


class Main{
	public static void main(String[] args)throws IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String name;
		int num;
		int compare;
		String waku="";

		int[] a=new int[2];
		int i=0;
		while(true){

			try{
				name=br.readLine();
				StringTokenizer st=new StringTokenizer(name," ");
				while (st.hasMoreTokens()) {
					a[i]=Integer.parseInt(st.nextToken());
					i++;
				}i=0;

				if(a[0]==0 && a[1]==0){
					System.exit(0);
				}

				else{
					for(int k=0; k<a[1]; k++){
						waku=waku+"#";
					}


					for(int j=0; j<a[0]; j++){
						System.out.println(waku);
					}
					System.out.println("");
					waku="";
				}
			}

			catch(Exception e){
				System.exit(0);
			}
		}
	}
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.util.StringTokenizer; StringTokenizer java.util class Main{
	public static void main(String[] args)throws IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String name;
		int num;
		int compare;
		String waku="";

		int[] a=new int[2];
		int i=0;
		while(true){

			try{
				name=br.readLine();
				StringTokenizer st=new StringTokenizer(name," ");
				while (st.hasMoreTokens()) {
					a[i]=Integer.parseInt(st.nextToken());
					i++;
				}i=0;

				if(a[0]==0 && a[1]==0){
					System.exit(0);
				}

				else{
					for(int k=0; k<a[1]; k++){
						waku=waku+"#";
					}


					for(int j=0; j<a[0]; j++){
						System.out.println(waku);
					}
					System.out.println("");
					waku="";
				}
			}

			catch(Exception e){
				System.exit(0);
			}
		}
	}
} Main public static void main(String[] args)throws IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String name;
		int num;
		int compare;
		String waku="";

		int[] a=new int[2];
		int i=0;
		while(true){

			try{
				name=br.readLine();
				StringTokenizer st=new StringTokenizer(name," ");
				while (st.hasMoreTokens()) {
					a[i]=Integer.parseInt(st.nextToken());
					i++;
				}i=0;

				if(a[0]==0 && a[1]==0){
					System.exit(0);
				}

				else{
					for(int k=0; k<a[1]; k++){
						waku=waku+"#";
					}


					for(int j=0; j<a[0]; j++){
						System.out.println(waku);
					}
					System.out.println("");
					waku="";
				}
			}

			catch(Exception e){
				System.exit(0);
			}
		}
	} main {
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String name;
		int num;
		int compare;
		String waku="";

		int[] a=new int[2];
		int i=0;
		while(true){

			try{
				name=br.readLine();
				StringTokenizer st=new StringTokenizer(name," ");
				while (st.hasMoreTokens()) {
					a[i]=Integer.parseInt(st.nextToken());
					i++;
				}i=0;

				if(a[0]==0 && a[1]==0){
					System.exit(0);
				}

				else{
					for(int k=0; k<a[1]; k++){
						waku=waku+"#";
					}


					for(int j=0; j<a[0]; j++){
						System.out.println(waku);
					}
					System.out.println("");
					waku="";
				}
			}

			catch(Exception e){
				System.exit(0);
			}
		}
	} BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String name; name int num; num int compare; compare String waku=""; waku "" int[] a=new int[2]; a new int[2] 2 int i=0; i 0 while(true){

			try{
				name=br.readLine();
				StringTokenizer st=new StringTokenizer(name," ");
				while (st.hasMoreTokens()) {
					a[i]=Integer.parseInt(st.nextToken());
					i++;
				}i=0;

				if(a[0]==0 && a[1]==0){
					System.exit(0);
				}

				else{
					for(int k=0; k<a[1]; k++){
						waku=waku+"#";
					}


					for(int j=0; j<a[0]; j++){
						System.out.println(waku);
					}
					System.out.println("");
					waku="";
				}
			}

			catch(Exception e){
				System.exit(0);
			}
		} true {

			try{
				name=br.readLine();
				StringTokenizer st=new StringTokenizer(name," ");
				while (st.hasMoreTokens()) {
					a[i]=Integer.parseInt(st.nextToken());
					i++;
				}i=0;

				if(a[0]==0 && a[1]==0){
					System.exit(0);
				}

				else{
					for(int k=0; k<a[1]; k++){
						waku=waku+"#";
					}


					for(int j=0; j<a[0]; j++){
						System.out.println(waku);
					}
					System.out.println("");
					waku="";
				}
			}

			catch(Exception e){
				System.exit(0);
			}
		} try{
				name=br.readLine();
				StringTokenizer st=new StringTokenizer(name," ");
				while (st.hasMoreTokens()) {
					a[i]=Integer.parseInt(st.nextToken());
					i++;
				}i=0;

				if(a[0]==0 && a[1]==0){
					System.exit(0);
				}

				else{
					for(int k=0; k<a[1]; k++){
						waku=waku+"#";
					}


					for(int j=0; j<a[0]; j++){
						System.out.println(waku);
					}
					System.out.println("");
					waku="";
				}
			}

			catch(Exception e){
				System.exit(0);
			} catch(Exception e){
				System.exit(0);
			} Exception e {
				System.exit(0);
			} System.exit(0) System.exit System 0 {
				name=br.readLine();
				StringTokenizer st=new StringTokenizer(name," ");
				while (st.hasMoreTokens()) {
					a[i]=Integer.parseInt(st.nextToken());
					i++;
				}i=0;

				if(a[0]==0 && a[1]==0){
					System.exit(0);
				}

				else{
					for(int k=0; k<a[1]; k++){
						waku=waku+"#";
					}


					for(int j=0; j<a[0]; j++){
						System.out.println(waku);
					}
					System.out.println("");
					waku="";
				}
			} name=br.readLine() name br.readLine() br.readLine br StringTokenizer st=new StringTokenizer(name," "); st new StringTokenizer(name," ") while (st.hasMoreTokens()) {
					a[i]=Integer.parseInt(st.nextToken());
					i++;
				} st.hasMoreTokens() st.hasMoreTokens st {
					a[i]=Integer.parseInt(st.nextToken());
					i++;
				} a[i]=Integer.parseInt(st.nextToken()) a[i] a i Integer.parseInt(st.nextToken()) Integer.parseInt Integer st.nextToken() st.nextToken st i++ i i=0 i 0 if(a[0]==0 && a[1]==0){
					System.exit(0);
				}

				else{
					for(int k=0; k<a[1]; k++){
						waku=waku+"#";
					}


					for(int j=0; j<a[0]; j++){
						System.out.println(waku);
					}
					System.out.println("");
					waku="";
				} a[0]==0 && a[1]==0 a[0]==0 a[0] a 0 0 a[1]==0 a[1] a 1 0 {
					System.exit(0);
				} System.exit(0) System.exit System 0 {
					for(int k=0; k<a[1]; k++){
						waku=waku+"#";
					}


					for(int j=0; j<a[0]; j++){
						System.out.println(waku);
					}
					System.out.println("");
					waku="";
				} for(int k=0; k<a[1]; k++){
						waku=waku+"#";
					} int k=0; int k=0; k 0 k<a[1] k a[1] a 1 k++ k++ k {
						waku=waku+"#";
					} {
						waku=waku+"#";
					} waku=waku+"#" waku waku+"#" waku "#" for(int j=0; j<a[0]; j++){
						System.out.println(waku);
					} int j=0; int j=0; j 0 j<a[0] j a[0] a 0 j++ j++ j {
						System.out.println(waku);
					} {
						System.out.println(waku);
					} System.out.println(waku) System.out.println System.out System System.out waku System.out.println("") System.out.println System.out System System.out "" waku="" waku "" String[] args args
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;


class Main{
	public static void main(String[] args)throws IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String name;
		int num;
		int compare;
		String waku="";

		int[] a=new int[2];
		int i=0;
		while(true){

			try{
				name=br.readLine();
				StringTokenizer st=new StringTokenizer(name," ");
				while (st.hasMoreTokens()) {
					a[i]=Integer.parseInt(st.nextToken());
					i++;
				}i=0;

				if(a[0]==0 && a[1]==0){
					System.exit(0);
				}

				else{
					for(int k=0; k<a[1]; k++){
						waku=waku+"#";
					}


					for(int j=0; j<a[0]; j++){
						System.out.println(waku);
					}
					System.out.println("");
					waku="";
				}
			}

			catch(Exception e){
				System.exit(0);
			}
		}
	}
}