import java.io.*;
public class randchar
{
  public static void main(String argsp[])throws IOException
  {
    String s;
    int x;
    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    System.out.println("insert a number:");
    s=br.readLine();
    x=Integer.parseInt(s);
      for(char j='A';j<='Z';j++)
      { for(char c='A';c<='Z';c++)
       { for(int i=1;i<x;i++)
          System.out.print(j);
         System.out.print(c+"\t");
        }
        System.out.println();
      }
  }
}