import java.util.Scanner;
import java.util.LinkedList;
import java.lang.Math;

class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        sc.close();
        char s1 = s.charAt(2),
        s2 = s.charAt(3),
        s3 = s.charAt(4),
        s4 = s.charAt(5);

        if(s1 == s2 && s3 == s4){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} import java.util.Scanner; Scanner java.util import java.util.LinkedList; LinkedList java.util import java.lang.Math; Math java.lang class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        sc.close();
        char s1 = s.charAt(2),
        s2 = s.charAt(3),
        s3 = s.charAt(4),
        s4 = s.charAt(5);

        if(s1 == s2 && s3 == s4){
            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();
        sc.close();
        char s1 = s.charAt(2),
        s2 = s.charAt(3),
        s3 = s.charAt(4),
        s4 = s.charAt(5);

        if(s1 == s2 && s3 == s4){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        sc.close();
        char s1 = s.charAt(2),
        s2 = s.charAt(3),
        s3 = s.charAt(4),
        s4 = s.charAt(5);

        if(s1 == s2 && s3 == s4){
            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 sc.close() sc.close sc char s1 = s.charAt(2) s1 s.charAt(2) s.charAt s 2 s2 = s.charAt(3) s2 s.charAt(3) s.charAt s 3 s3 = s.charAt(4) s3 s.charAt(4) s.charAt s 4 s4 = s.charAt(5); s4 s.charAt(5) s.charAt s 5 if(s1 == s2 && s3 == s4){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } s1 == s2 && s3 == s4 s1 == s2 s1 s2 s3 == s4 s3 s4 {
            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.util.Scanner;
import java.util.LinkedList;
import java.lang.Math;

class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        sc.close();
        char s1 = s.charAt(2),
        s2 = s.charAt(3),
        s3 = s.charAt(4),
        s4 = s.charAt(5);

        if(s1 == s2 && s3 == s4){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
}