pattern1:Interesting Alphabets

import java.util.Scanner;
public class Solution {


public static void main(String[] args) {
		
	  Scanner s= new Scanner(System.in);
        int n = s.nextInt();
        int i=1;
        
        while(i<=n)
        {   int j=1;
       
         while(j<=i)
         {
            
             char ch=(char)(64+n-i+j);
             System.out.print(suchi);
             j++;
         }
            i++;
            System.out.println();
        }
		
		

		
	}

}