import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] S = sc.next().toCharArray();
        String ans = "No";
        if(S[2] == S[3] && S[4] == S[5]) ans = "Yes";
        System.out.println(ans);
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] S = sc.next().toCharArray();
        String ans = "No";
        if(S[2] == S[3] && S[4] == S[5]) ans = "Yes";
        System.out.println(ans);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] S = sc.next().toCharArray();
        String ans = "No";
        if(S[2] == S[3] && S[4] == S[5]) ans = "Yes";
        System.out.println(ans);
    } main {
        Scanner sc = new Scanner(System.in);
        char[] S = sc.next().toCharArray();
        String ans = "No";
        if(S[2] == S[3] && S[4] == S[5]) ans = "Yes";
        System.out.println(ans);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) char[] S = sc.next().toCharArray(); S sc.next().toCharArray() sc.next().toCharArray sc.next() sc.next sc String ans = "No"; ans "No" if(S[2] == S[3] && S[4] == S[5]) ans = "Yes"; S[2] == S[3] && S[4] == S[5] S[2] == S[3] S[2] S 2 S[3] S 3 S[4] == S[5] S[4] S 4 S[5] S 5 ans = "Yes" ans "Yes" System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] S = sc.next().toCharArray();
        String ans = "No";
        if(S[2] == S[3] && S[4] == S[5]) ans = "Yes";
        System.out.println(ans);
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] S = sc.next().toCharArray();
        String ans = "No";
        if(S[2] == S[3] && S[4] == S[5]) ans = "Yes";
        System.out.println(ans);
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] S = sc.next().toCharArray();
        String ans = "No";
        if(S[2] == S[3] && S[4] == S[5]) ans = "Yes";
        System.out.println(ans);
    }
}
