import java.io.*;
import java.util.StringTokenizer;
public class text{
static void main(String argumendid[]) throws IOException{
//    System.out.println(Programm valjastab a tahega algavad sonad sinu sisestatud tekstist.);
//    String lause=Tekstiabi.kysiVastus("Palun lause:");
//    if(lause.startsWith("a"))System.out.println(lause);
      BufferedReader br=new BufferedReader(
      new InputStreamReader(System.in)      
    );
//    String rida=br.readLine();
//    if(rida.startsWith("a"))System.out.println(rida);

	String fail=br.readLine();
	StringTokenizer st=new StringTokenizer(fail," ");
	while(st.hasMoreTokens()){
	String uus=st.nextToken();
	if(uus.startsWith("a"))System.out.println(uus);
//        System.out.println(st.nextToken());
       }
 }
}