import java.util.*;
import java.lang.*;
import java.io.*;

public class Main {
    public static void main(String[] args) throws java.lang.Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader((System.in)));
        StringTokenizer st = new StringTokenizer(br.readLine());
        char[] s = st.nextToken().toCharArray();
        if (s[2] == s[3] && s[4] == s[5]) System.out.println("Yes");
        else System.out.println("No");
//        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
//        bw.write("\n");
//        bw.close();
    }

}
/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