//Following program for print alphabet triangle
package r4r.co.in;

import java.io.*;

public class NewClass {

    public static void main(String[] args) throws IOException {
        BufferedReader Digit = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("Enter the Row:");
        String s1 = Digit.readLine();

        //Code for Triangle

        char ascii[] = new char[100];               //Initilize ascii[]
        for (int i = 0, a = 65; a < 99; a++) {     //store value in array
            ascii[i] = (char) a;                  //Type conversion
            i++;                                 //Increament value in array 
        }

        int n1 = Integer.parseInt(s1);          //Type Conversition
        System.out.println("Here Triangle:\n");
        //int count = 0;
        for (int i = 0; i < n1; i++) {
            for (int j = 0; j <= i; j++) {
                System.out.print(ascii[i]);
            }
            System.out.print("\n");
        }

    }
}