import java.util.Scanner;

/**
 * Replace this JavaDoc comment for the purpose of this class
 */
public class Solution
{
	/**
	 * Gets data from standard input
	 */
	private Scanner input = null;

	/**
	 * Start the execution of the solution
	 * @param args Command line arguments
	 */
	public static void main(String args[])
	{
		Solution solution = new Solution();
		solution.run();
	}

	/**
	 * Run the solution. This method is called from main()
	 */
	public void run()
	{
		// Create object to read data from standard input
		this.input = new Scanner(System.in);

		
		List students = new List();
		
		// This code replicates the input to the standard output
		// Modify this code to solve the problem
		while ( this.input.hasNextLine() )
		{
			String name = this.input.nextLine().trim();
			
			if ( name.length() > 0 )
			{
				students.append( name );
			}
		}
		
		students.print( System.out );

		// Close the standard input
		this.input.close();
	}
}