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