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