import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        int i = 0;
        if(S.charAt(2) == S.charAt(3)) i++;
        if(S.charAt(4) == S.charAt(5)) i++;
        if(i == 2){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        int i = 0;
        if(S.charAt(2) == S.charAt(3)) i++;
        if(S.charAt(4) == S.charAt(5)) i++;
        if(i == 2){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        int i = 0;
        if(S.charAt(2) == S.charAt(3)) i++;
        if(S.charAt(4) == S.charAt(5)) i++;
        if(i == 2){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        int i = 0;
        if(S.charAt(2) == S.charAt(3)) i++;
        if(S.charAt(4) == S.charAt(5)) i++;
        if(i == 2){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String S = sc.next(); S sc.next() sc.next sc int i = 0; i 0 if(S.charAt(2) == S.charAt(3)) i++; S.charAt(2) == S.charAt(3) S.charAt(2) S.charAt S 2 S.charAt(3) S.charAt S 3 i++ i if(S.charAt(4) == S.charAt(5)) i++; S.charAt(4) == S.charAt(5) S.charAt(4) S.charAt S 4 S.charAt(5) S.charAt S 5 i++ i if(i == 2){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } i == 2 i 2 {
            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 sc = new Scanner(System.in);
        String S = sc.next();
        int i = 0;
        if(S.charAt(2) == S.charAt(3)) i++;
        if(S.charAt(4) == S.charAt(5)) i++;
        if(i == 2){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        int i = 0;
        if(S.charAt(2) == S.charAt(3)) i++;
        if(S.charAt(4) == S.charAt(5)) i++;
        if(i == 2){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} Main
import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        int i = 0;
        if(S.charAt(2) == S.charAt(3)) i++;
        if(S.charAt(4) == S.charAt(5)) i++;
        if(i == 2){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
}