import java.util.*;
import java.io.*;
import java.lang.*;
public class Main{

     public static void main(String []args) throws Exception {
        BufferedReader inp = new BufferedReader(new InputStreamReader(System.in));
        String s = inp.readLine().trim();
        int len = s.length();
        if(len==0 || len>6){
            System.out.println("No");
        }else{
            if(s.charAt(2) == s.charAt(3)  && s.charAt(4)==s.charAt(5)){
                System.out.println("Yes");
            }else{
                System.out.println("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