import java.io.*;
 
/**
 *
 * @author Arobavx
 */
public class SacarPosiblesMails {
    public static void main(String[] args) throws FileNotFoundException, IOException{
    File f = new File(""+args[0]);;
    FileInputStream str= new FileInputStream(f);
    String Texto="";
    for(int i = 0 ; i<str.available();i++){
		char caracter = (char)str.read();
		System.out.print(caracter);
        Texto +=caracter;
    }
    String[] palabras = Texto.split("'");
    FileOutputStream fout = new FileOutputStream(f+"_filtrado.txt");
    for(String s : palabras){
        if(esunmail(s)){
            byte[] byt = s.getBytes();
            fout.write(byt);
            fout.write((byte)10);
        }
 
    }
    }
    public static boolean esunmail(String palabra){
        byte[] letras = palabra.getBytes();
        boolean arroba = false;
        boolean punto = false;
        for(byte bitee : letras){
            if((char)bitee == '@'){
                arroba = true;
            }else if((char)bitee=='.'){
                punto = true;
            }
        }
        if(arroba && punto){
        return true;
        }
        return false;
    }
 
 
}