/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	static String[] sz = { "a", "b", "c", "d", "e", "f" /* ... */ };
 
	static void showTable(int n)
	{
		for (int i = 1; i <= n; i++)
		{
			for (int j = 0; j <= n - i; j++)
			{
				System.out.print(" ");
			}
			for (int j = i - 1; j >= 0; j--)
			{
				System.out.print(sz[j]);
			}
			System.out.println();
		}
	}
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		showTable(5);
	}
}

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