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

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();

		for(;;) {
			String num = br.readLine();
			String[] set = num.split(" ");

			int a = Integer.parseInt(set[0]);
			int b = Integer.parseInt(set[1]);

			if (a==0 && b==0) {
				break;
			}

			for (int i = 0; i < a ; i++) {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			}
			sb.append("\n");
		}

		System.out.print(sb);

	}

} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();

		for(;;) {
			String num = br.readLine();
			String[] set = num.split(" ");

			int a = Integer.parseInt(set[0]);
			int b = Integer.parseInt(set[1]);

			if (a==0 && b==0) {
				break;
			}

			for (int i = 0; i < a ; i++) {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			}
			sb.append("\n");
		}

		System.out.print(sb);

	}

} Main public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();

		for(;;) {
			String num = br.readLine();
			String[] set = num.split(" ");

			int a = Integer.parseInt(set[0]);
			int b = Integer.parseInt(set[1]);

			if (a==0 && b==0) {
				break;
			}

			for (int i = 0; i < a ; i++) {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			}
			sb.append("\n");
		}

		System.out.print(sb);

	} main {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();

		for(;;) {
			String num = br.readLine();
			String[] set = num.split(" ");

			int a = Integer.parseInt(set[0]);
			int b = Integer.parseInt(set[1]);

			if (a==0 && b==0) {
				break;
			}

			for (int i = 0; i < a ; i++) {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			}
			sb.append("\n");
		}

		System.out.print(sb);

	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) StringBuilder sb = new StringBuilder(); sb new StringBuilder() for(;;) {
			String num = br.readLine();
			String[] set = num.split(" ");

			int a = Integer.parseInt(set[0]);
			int b = Integer.parseInt(set[1]);

			if (a==0 && b==0) {
				break;
			}

			for (int i = 0; i < a ; i++) {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			}
			sb.append("\n");
		} ; {
			String num = br.readLine();
			String[] set = num.split(" ");

			int a = Integer.parseInt(set[0]);
			int b = Integer.parseInt(set[1]);

			if (a==0 && b==0) {
				break;
			}

			for (int i = 0; i < a ; i++) {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			}
			sb.append("\n");
		} {
			String num = br.readLine();
			String[] set = num.split(" ");

			int a = Integer.parseInt(set[0]);
			int b = Integer.parseInt(set[1]);

			if (a==0 && b==0) {
				break;
			}

			for (int i = 0; i < a ; i++) {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			}
			sb.append("\n");
		} String num = br.readLine(); num br.readLine() br.readLine br String[] set = num.split(" "); set num.split(" ") num.split num " " int a = Integer.parseInt(set[0]); a Integer.parseInt(set[0]) Integer.parseInt Integer set[0] set 0 int b = Integer.parseInt(set[1]); b Integer.parseInt(set[1]) Integer.parseInt Integer set[1] set 1 if (a==0 && b==0) {
				break;
			} a==0 && b==0 a==0 a 0 b==0 b 0 {
				break;
			} break; for (int i = 0; i < a ; i++) {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			} int i = 0; int i = 0; i 0 i < a i a i++ i++ i {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			} {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			} for (int j = 0; j < b ; j++) {
					sb.append("#");
				} int j = 0; int j = 0; j 0 j < b j b j++ j++ j {
					sb.append("#");
				} {
					sb.append("#");
				} sb.append("#") sb.append sb "#" sb.append("\n") sb.append sb "\n" sb.append("\n") sb.append sb "\n" System.out.print(sb) System.out.print System.out System System.out sb String[] args args public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();

		for(;;) {
			String num = br.readLine();
			String[] set = num.split(" ");

			int a = Integer.parseInt(set[0]);
			int b = Integer.parseInt(set[1]);

			if (a==0 && b==0) {
				break;
			}

			for (int i = 0; i < a ; i++) {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			}
			sb.append("\n");
		}

		System.out.print(sb);

	}

} public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();

		for(;;) {
			String num = br.readLine();
			String[] set = num.split(" ");

			int a = Integer.parseInt(set[0]);
			int b = Integer.parseInt(set[1]);

			if (a==0 && b==0) {
				break;
			}

			for (int i = 0; i < a ; i++) {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			}
			sb.append("\n");
		}

		System.out.print(sb);

	}

} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringBuilder sb = new StringBuilder();

		for(;;) {
			String num = br.readLine();
			String[] set = num.split(" ");

			int a = Integer.parseInt(set[0]);
			int b = Integer.parseInt(set[1]);

			if (a==0 && b==0) {
				break;
			}

			for (int i = 0; i < a ; i++) {
				for (int j = 0; j < b ; j++) {
					sb.append("#");
				}
				sb.append("\n");
			}
			sb.append("\n");
		}

		System.out.print(sb);

	}

}