import java.io.*;

public class Erast {

    static public void main(String args[]) {

      InputStreamReader in1 = new InputStreamReader(System.in);
      OutputStreamWriter out2 = new OutputStreamWriter(System.out);

      PipedReader in2 = new PipedReader();
      PipedWriter out1 = new PipedWriter();
      try { out1.connect(in2); }
      catch (IOException e) { System.out.println(e); }

      int initReadBufSize = 100;
      int initWriteBufSize = 100;

      // Generate is the class that implements the generate computation
      Generate compute = new Generate();

      FilterImpl gen = new FilterImpl(in1, out1, initReadBufSize, initWriteBufSize, compute);
      // give the computation thread a hook back into the Filter
      compute.setFilter(gen);

      // Sieve is the class that implements the sieve computation
      Sieve s1 = new Sieve();

      FilterImpl sieve = new FilterImpl(in2, out2, initReadBufSize, initWriteBufSize, s1);
      // give the computation thread a hook back into the Filter
      s1.setFilter(sieve);

      gen.startFilter();
      sieve.startFilter();

    }
}