import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String S = scan.nextLine();
        int N=S.length();
        if(N==6){
            if(S.charAt(2)==S.charAt(3)&&S.charAt(4)==S.charAt(5)){
                System.out.println("Yes");
            }
            else{
                System.out.println("No");
            }
        }
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String S = scan.nextLine();
        int N=S.length();
        if(N==6){
            if(S.charAt(2)==S.charAt(3)&&S.charAt(4)==S.charAt(5)){
                System.out.println("Yes");
            }
            else{
                System.out.println("No");
            }
        }
    }
} Main public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String S = scan.nextLine();
        int N=S.length();
        if(N==6){
            if(S.charAt(2)==S.charAt(3)&&S.charAt(4)==S.charAt(5)){
                System.out.println("Yes");
            }
            else{
                System.out.println("No");
            }
        }
    } main {
        Scanner scan = new Scanner(System.in);
        String S = scan.nextLine();
        int N=S.length();
        if(N==6){
            if(S.charAt(2)==S.charAt(3)&&S.charAt(4)==S.charAt(5)){
                System.out.println("Yes");
            }
            else{
                System.out.println("No");
            }
        }
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String S = scan.nextLine(); S scan.nextLine() scan.nextLine scan int N=S.length(); N S.length() S.length S if(N==6){
            if(S.charAt(2)==S.charAt(3)&&S.charAt(4)==S.charAt(5)){
                System.out.println("Yes");
            }
            else{
                System.out.println("No");
            }
        } N==6 N 6 {
            if(S.charAt(2)==S.charAt(3)&&S.charAt(4)==S.charAt(5)){
                System.out.println("Yes");
            }
            else{
                System.out.println("No");
            }
        } if(S.charAt(2)==S.charAt(3)&&S.charAt(4)==S.charAt(5)){
                System.out.println("Yes");
            }
            else{
                System.out.println("No");
            } S.charAt(2)==S.charAt(3)&&S.charAt(4)==S.charAt(5) S.charAt(2)==S.charAt(3) S.charAt(2) S.charAt S 2 S.charAt(3) S.charAt S 3 S.charAt(4)==S.charAt(5) S.charAt(4) S.charAt S 4 S.charAt(5) S.charAt S 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) {
        Scanner scan = new Scanner(System.in);
        String S = scan.nextLine();
        int N=S.length();
        if(N==6){
            if(S.charAt(2)==S.charAt(3)&&S.charAt(4)==S.charAt(5)){
                System.out.println("Yes");
            }
            else{
                System.out.println("No");
            }
        }
    }
} public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String S = scan.nextLine();
        int N=S.length();
        if(N==6){
            if(S.charAt(2)==S.charAt(3)&&S.charAt(4)==S.charAt(5)){
                System.out.println("Yes");
            }
            else{
                System.out.println("No");
            }
        }
    }
} Main
import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String S = scan.nextLine();
        int N=S.length();
        if(N==6){
            if(S.charAt(2)==S.charAt(3)&&S.charAt(4)==S.charAt(5)){
                System.out.println("Yes");
            }
            else{
                System.out.println("No");
            }
        }
    }
}
