import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String s1 = s.substring(2, 3);
        String s2 = s.substring(3, 4);
        String s3 = s.substring(4, 5);
        String s4 = s.substring(5, 6);
        if(s1.equals(s2) && s3.equals(s4)) System.out.println("Yes");
        else System.out.println("No");
    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String s1 = s.substring(2, 3);
        String s2 = s.substring(3, 4);
        String s3 = s.substring(4, 5);
        String s4 = s.substring(5, 6);
        if(s1.equals(s2) && s3.equals(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();
        String s1 = s.substring(2, 3);
        String s2 = s.substring(3, 4);
        String s3 = s.substring(4, 5);
        String s4 = s.substring(5, 6);
        if(s1.equals(s2) && s3.equals(s4)) System.out.println("Yes");
        else System.out.println("No");
    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String s1 = s.substring(2, 3);
        String s2 = s.substring(3, 4);
        String s3 = s.substring(4, 5);
        String s4 = s.substring(5, 6);
        if(s1.equals(s2) && s3.equals(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 String s1 = s.substring(2, 3); s1 s.substring(2, 3) s.substring s 2 3 String s2 = s.substring(3, 4); s2 s.substring(3, 4) s.substring s 3 4 String s3 = s.substring(4, 5); s3 s.substring(4, 5) s.substring s 4 5 String s4 = s.substring(5, 6); s4 s.substring(5, 6) s.substring s 5 6 if(s1.equals(s2) && s3.equals(s4)) System.out.println("Yes");
        else System.out.println("No"); s1.equals(s2) && s3.equals(s4) s1.equals(s2) s1.equals s1 s2 s3.equals(s4) s3.equals s3 s4 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 public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String s1 = s.substring(2, 3);
        String s2 = s.substring(3, 4);
        String s3 = s.substring(4, 5);
        String s4 = s.substring(5, 6);
        if(s1.equals(s2) && s3.equals(s4)) 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();
        String s1 = s.substring(2, 3);
        String s2 = s.substring(3, 4);
        String s3 = s.substring(4, 5);
        String s4 = s.substring(5, 6);
        if(s1.equals(s2) && s3.equals(s4)) System.out.println("Yes");
        else System.out.println("No");
    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String s1 = s.substring(2, 3);
        String s2 = s.substring(3, 4);
        String s3 = s.substring(4, 5);
        String s4 = s.substring(5, 6);
        if(s1.equals(s2) && s3.equals(s4)) System.out.println("Yes");
        else System.out.println("No");
    }
}