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