import java.util.*;

public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        char s3 = s.charAt(2);
        char s4 = s.charAt(3);
        char s5 = s.charAt(4);
        char s6 = s.charAt(5);
        if((s3==s4)&&(s5==s6)){
            System.out.println("Yes");
        }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 s3 = s.charAt(2);
        char s4 = s.charAt(3);
        char s5 = s.charAt(4);
        char s6 = s.charAt(5);
        if((s3==s4)&&(s5==s6)){
            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();
        char s3 = s.charAt(2);
        char s4 = s.charAt(3);
        char s5 = s.charAt(4);
        char s6 = s.charAt(5);
        if((s3==s4)&&(s5==s6)){
            System.out.println("Yes");
        }else {
            System.out.println("No");
        }


    } main {

        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        char s3 = s.charAt(2);
        char s4 = s.charAt(3);
        char s5 = s.charAt(4);
        char s6 = s.charAt(5);
        if((s3==s4)&&(s5==s6)){
            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 char s3 = s.charAt(2); s3 s.charAt(2) s.charAt s 2 char s4 = s.charAt(3); s4 s.charAt(3) s.charAt s 3 char s5 = s.charAt(4); s5 s.charAt(4) s.charAt s 4 char s6 = s.charAt(5); s6 s.charAt(5) s.charAt s 5 if((s3==s4)&&(s5==s6)){
            System.out.println("Yes");
        }else {
            System.out.println("No");
        } (s3==s4)&&(s5==s6) (s3==s4) s3 s4 (s5==s6) s5 s6 {
            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 sc = new Scanner(System.in);
        String s = sc.next();
        char s3 = s.charAt(2);
        char s4 = s.charAt(3);
        char s5 = s.charAt(4);
        char s6 = s.charAt(5);
        if((s3==s4)&&(s5==s6)){
            System.out.println("Yes");
        }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 s3 = s.charAt(2);
        char s4 = s.charAt(3);
        char s5 = s.charAt(4);
        char s6 = s.charAt(5);
        if((s3==s4)&&(s5==s6)){
            System.out.println("Yes");
        }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 s3 = s.charAt(2);
        char s4 = s.charAt(3);
        char s5 = s.charAt(4);
        char s6 = s.charAt(5);
        if((s3==s4)&&(s5==s6)){
            System.out.println("Yes");
        }else {
            System.out.println("No");
        }


    }
}
