import java.math.BigInteger;
import java.util.*;

class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int i = 0;

        if(s.substring(2,3).equals(s.substring(3,4))){
            i++;
        }
        if(s.substring(4,5).equals(s.substring(5,6))){
            i++;
        }
        if(i==2){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");
        } 
    }
} import java.math.BigInteger; BigInteger java.math import java.util.*; util.* java class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int i = 0;

        if(s.substring(2,3).equals(s.substring(3,4))){
            i++;
        }
        if(s.substring(4,5).equals(s.substring(5,6))){
            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.nextLine();
        int i = 0;

        if(s.substring(2,3).equals(s.substring(3,4))){
            i++;
        }
        if(s.substring(4,5).equals(s.substring(5,6))){
            i++;
        }
        if(i==2){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");
        } 
    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int i = 0;

        if(s.substring(2,3).equals(s.substring(3,4))){
            i++;
        }
        if(s.substring(4,5).equals(s.substring(5,6))){
            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.nextLine(); s sc.nextLine() sc.nextLine sc int i = 0; i 0 if(s.substring(2,3).equals(s.substring(3,4))){
            i++;
        } s.substring(2,3).equals(s.substring(3,4)) s.substring(2,3).equals s.substring(2,3) s.substring s 2 3 s.substring(3,4) s.substring s 3 4 {
            i++;
        } i++ i if(s.substring(4,5).equals(s.substring(5,6))){
            i++;
        } s.substring(4,5).equals(s.substring(5,6)) s.substring(4,5).equals s.substring(4,5) s.substring s 4 5 s.substring(5,6) s.substring s 5 6 {
            i++;
        } 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
import java.math.BigInteger;
import java.util.*;

class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int i = 0;

        if(s.substring(2,3).equals(s.substring(3,4))){
            i++;
        }
        if(s.substring(4,5).equals(s.substring(5,6))){
            i++;
        }
        if(i==2){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");
        } 
    }
}