import java.util.*;

public class Table {

  static String buildHorizontal(int n, char left, char center, char right, char space) {
    StringBuilder sb = new StringBuilder();
    sb.append(left);
    for (int i = 0; i < n; i++) {
      if (i > 0)
        sb.append(center);
      sb.append(space);
    }
    sb.append(right);
    return sb.toString();
  }

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int m = sc.nextInt();
    System.out.println(buildHorizontal(m, '\u250C', '\u252C', '\u2510', '\u2500'));
    for (int i = 0; i < n; i++) {
      if (i > 0)
        System.out.println(buildHorizontal(m, '\u251C', '\u253C', '\u2524', '\u2500'));
      System.out.println(buildHorizontal(m, '\u2502', '\u2502', '\u2502', ' '));
    }
    System.out.println(buildHorizontal(m, '\u2514', '\u2534', '\u2518', '\u2500'));
  }
}