import java.util.*;
import java.math.*;

public class Main {
    public static void main(String[] args) {
        Scanner itr = new Scanner(System.in);
        String s = itr.next();

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

        if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) {
        Scanner itr = new Scanner(System.in);
        String s = itr.next();

        if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner itr = new Scanner(System.in);
        String s = itr.next();

        if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } Scanner itr = new Scanner(System.in); itr new Scanner(System.in) String s = itr.next(); s itr.next() itr.next itr if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } 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 {
            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 itr = new Scanner(System.in);
        String s = itr.next();

        if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String[] args) {
        Scanner itr = new Scanner(System.in);
        String s = itr.next();

        if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main
import java.util.*;
import java.math.*;

public class Main {
    public static void main(String[] args) {
        Scanner itr = new Scanner(System.in);
        String s = itr.next();

        if (s.charAt(2) == s.charAt(3) && s.charAt(4) == s.charAt(5)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}