import java.io.*;
import java.util.StringTokenizer;



public class maija2
{
	public static void main( String args[] ) throws Exception
	{
		
		String margid = " .,!?;";
			
		BufferedReader br2 = new BufferedReader( new InputStreamReader( System.in ) );
		System.out.print("Palun failinimi: ");
		String strFailinimi = br2.readLine();
						
		System.out.print("Palun sona: ");
		String strSona = br2.readLine();
						 		  	
		StringBuffer Sonapikkus = new StringBuffer( strSona ); 
		
		// 
		BufferedReader fInput = new BufferedReader( new FileReader( strFailinimi ) );

		// 
		String strRida = fInput.readLine();
		while ( strRida != null )
		{
			// 
			StringTokenizer token = new StringTokenizer( strRida, margid );
			while ( token.hasMoreTokens() )
			{
				String strNewSona = token.nextToken();
				StringBuffer strNewSonapikkus = new StringBuffer( strNewSona );

				// 
				if ( strNewSonapikkus.length() == Sonapikkus.length() )
							   	   
				    System.out.println( strNewSona );
			}

			strRida = fInput.readLine();
		}
				
	}
   
}