SequanceOfEqualStrings.java

import java.util.Scanner;

public class _02_SequencesOfEqualStrings 
{
	public static void main(String[] args) 
	{
		Scanner scan = new Scanner(System.in);
		String[] input = scan.nextLine().split(" ");
		String lastWord = input[0];

		for (String word : input) 
		{
			if (!(word.equals(lastWord)))
			{
				System.out.println();
			}
			System.out.print(word + " ");
			lastWord = word;
		}		
	}
}