import java.util.*;
import java.io.*;
import java.math.*;
 
public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        char[] cl = sc.next().toCharArray();
        if(cl[2] == cl[3] && cl[4] == cl[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }

} import java.util.*; util.* java import java.io.*; io.* java import java.math.*; math.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        char[] cl = sc.next().toCharArray();
        if(cl[2] == cl[3] && cl[4] == cl[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }

} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        char[] cl = sc.next().toCharArray();
        if(cl[2] == cl[3] && cl[4] == cl[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        char[] cl = sc.next().toCharArray();
        if(cl[2] == cl[3] && cl[4] == cl[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) char[] cl = sc.next().toCharArray(); cl sc.next().toCharArray() sc.next().toCharArray sc.next() sc.next sc if(cl[2] == cl[3] && cl[4] == cl[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } cl[2] == cl[3] && cl[4] == cl[5] cl[2] == cl[3] cl[2] cl 2 cl[3] cl 3 cl[4] == cl[5] cl[4] cl 4 cl[5] cl 5 {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        char[] cl = sc.next().toCharArray();
        if(cl[2] == cl[3] && cl[4] == cl[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }

} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        char[] cl = sc.next().toCharArray();
        if(cl[2] == cl[3] && cl[4] == cl[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }

} Main
import java.util.*;
import java.io.*;
import java.math.*;
 
public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        char[] cl = sc.next().toCharArray();
        if(cl[2] == cl[3] && cl[4] == cl[5]){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }

}