/* package whatever; // don't place package name! */
 
class M{
  static String c(int n){
    String r = "";
    for(int i = -1, j; ++i < n; r += "\n"){
      for(j = 0; j < n;
            r += i < 1 | j < 1 | n-i < 2 | n-j < 2 | i == j | i == n-++j
             ? "*"
             : " ");
    }
    return r;
  }
 
  public static void main(String[] a){
    System.out.println(c(1));
    System.out.println(c(3));
    System.out.println(c(5));
    System.out.println(c(6));
    System.out.println(c(7));
  }
}

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