import java.io.*;
import java.net.*;
class Failnetti1 {
static String n;
static String p;
public Failnetti1(String un, String up){
n=un;
p=up;
}
public static void main(String argumendid[])throws IOException{
 ServerSocket ss=new ServerSocket(2345);
while(true){
 
 Socket sc=ss.accept();
  BufferedReader sisse=new BufferedReader(
  new InputStreamReader(sc.getInputStream())
   );
  PrintWriter valja=new PrintWriter(sc.getOutputStream());
 int nr=Integer.parseInt(sisse.readLine());
 int rarv=ridadearv("paev"+nr+".txt");
 if (rarv<=19){

 PrintWriter faili=new PrintWriter(
   new FileWriter("paev"+nr+".txt",true),true
  );
   n=sisse.readLine();
   p=sisse.readLine();
   faili.println(n+ "   |   "+p);
   faili.close();
   valja.println("Koht olemas");
}
else{
 valja.println("Kohad on täis!!!!!!");
}
valja.close();
};
  }
  static int ridadearv(String failinimi){
    int miturida=0;

    try{
    BufferedReader sisse=new BufferedReader(
      new FileReader(failinimi)
    );
    while(sisse.readLine()!=null)miturida++;
    } catch (Exception probleem){
      miturida=0;
    };
    return miturida;
  }
  }