import static jdk.nashorn.internal.runtime.regexp.joni.encoding.CharacterType.S;
import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        String S = scan.next();
        if(S.charAt(2)==S.charAt(3) && S.charAt(4)==S.charAt(5)){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} import static jdk.nashorn.internal.runtime.regexp.joni.encoding.CharacterType.S; import static jdk.nashorn.internal.runtime.regexp.joni.encoding.CharacterType.S; import static jdk.nashorn.internal.runtime.regexp.joni.encoding.CharacterType.S; import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        String S = scan.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 scan = new Scanner(System.in);
        String S = scan.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 scan = new Scanner(System.in);
        String S = scan.next();
        if(S.charAt(2)==S.charAt(3) && S.charAt(4)==S.charAt(5)){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) String S = scan.next(); S scan.next() scan.next scan 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 scan = new Scanner(System.in);
        String S = scan.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 scan = new Scanner(System.in);
        String S = scan.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 static jdk.nashorn.internal.runtime.regexp.joni.encoding.CharacterType.S;
import java.util.Scanner;

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