import java.util.*;

public class Main {
    public static void main(String args[]) {
     
    Scanner sc = new Scanner(System.in);
    
    String s = sc.nextLine();
    if(util(s))
    System.out.println("Yes");
    else
    System.out.println("No");

        
    }
    static boolean util(String s){
        
        
        if( s.charAt(2)==s.charAt(3) &&s.charAt(4)==s.charAt(5))
        return true;
        else
        return false;
    }
} import java.util.*; util.* java public class Main {
    public static void main(String args[]) {
     
    Scanner sc = new Scanner(System.in);
    
    String s = sc.nextLine();
    if(util(s))
    System.out.println("Yes");
    else
    System.out.println("No");

        
    }
    static boolean util(String s){
        
        
        if( s.charAt(2)==s.charAt(3) &&s.charAt(4)==s.charAt(5))
        return true;
        else
        return false;
    }
} Main public static void main(String args[]) {
     
    Scanner sc = new Scanner(System.in);
    
    String s = sc.nextLine();
    if(util(s))
    System.out.println("Yes");
    else
    System.out.println("No");

        
    } main {
     
    Scanner sc = new Scanner(System.in);
    
    String s = sc.nextLine();
    if(util(s))
    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 if(util(s))
    System.out.println("Yes");
    else
    System.out.println("No"); util(s) util s System.out.println("Yes") System.out.println System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" String args[] args static boolean util(String s){
        
        
        if( s.charAt(2)==s.charAt(3) &&s.charAt(4)==s.charAt(5))
        return true;
        else
        return false;
    } util {
        
        
        if( s.charAt(2)==s.charAt(3) &&s.charAt(4)==s.charAt(5))
        return true;
        else
        return false;
    } if( s.charAt(2)==s.charAt(3) &&s.charAt(4)==s.charAt(5))
        return true;
        else
        return false; 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 return true; true return false; false String s s public class Main {
    public static void main(String args[]) {
     
    Scanner sc = new Scanner(System.in);
    
    String s = sc.nextLine();
    if(util(s))
    System.out.println("Yes");
    else
    System.out.println("No");

        
    }
    static boolean util(String s){
        
        
        if( s.charAt(2)==s.charAt(3) &&s.charAt(4)==s.charAt(5))
        return true;
        else
        return false;
    }
} public class Main {
    public static void main(String args[]) {
     
    Scanner sc = new Scanner(System.in);
    
    String s = sc.nextLine();
    if(util(s))
    System.out.println("Yes");
    else
    System.out.println("No");

        
    }
    static boolean util(String s){
        
        
        if( s.charAt(2)==s.charAt(3) &&s.charAt(4)==s.charAt(5))
        return true;
        else
        return false;
    }
} Main
import java.util.*;

public class Main {
    public static void main(String args[]) {
     
    Scanner sc = new Scanner(System.in);
    
    String s = sc.nextLine();
    if(util(s))
    System.out.println("Yes");
    else
    System.out.println("No");

        
    }
    static boolean util(String s){
        
        
        if( s.charAt(2)==s.charAt(3) &&s.charAt(4)==s.charAt(5))
        return true;
        else
        return false;
    }
}
