import java.io.*;

public class Main {
  
  static String s;

  public static void main(String[] args) throws IOException {

    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

    s = br.readLine();

    br.close();

    boolean ok = true;
    if(s.charAt(2) != s.charAt(3)) ok = false;
    if(s.charAt(4) != s.charAt(5)) ok = false;
    System.out.println(ok ? "Yes" : "No");
  }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz