import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner scn = new Scanner(System.in);
        String str = scn.nextLine();
        Boolean a = str.charAt(2) == (str.charAt(3));
        Boolean b = str.charAt(4) == (str.charAt(5));
        if(a && b) System.out.println("Yes");
        else System.out.println("No");
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner scn = new Scanner(System.in);
        String str = scn.nextLine();
        Boolean a = str.charAt(2) == (str.charAt(3));
        Boolean b = str.charAt(4) == (str.charAt(5));
        if(a && b) System.out.println("Yes");
        else System.out.println("No");
    }
} Main public static void main(String[] args) throws Exception {
        
        Scanner scn = new Scanner(System.in);
        String str = scn.nextLine();
        Boolean a = str.charAt(2) == (str.charAt(3));
        Boolean b = str.charAt(4) == (str.charAt(5));
        if(a && b) System.out.println("Yes");
        else System.out.println("No");
    } main {
        
        Scanner scn = new Scanner(System.in);
        String str = scn.nextLine();
        Boolean a = str.charAt(2) == (str.charAt(3));
        Boolean b = str.charAt(4) == (str.charAt(5));
        if(a && b) System.out.println("Yes");
        else System.out.println("No");
    } Scanner scn = new Scanner(System.in); scn new Scanner(System.in) String str = scn.nextLine(); str scn.nextLine() scn.nextLine scn Boolean a = str.charAt(2) == (str.charAt(3)); a str.charAt(2) == (str.charAt(3)) str.charAt(2) str.charAt str 2 (str.charAt(3)) str.charAt str 3 Boolean b = str.charAt(4) == (str.charAt(5)); b str.charAt(4) == (str.charAt(5)) str.charAt(4) str.charAt str 4 (str.charAt(5)) str.charAt str 5 if(a && b) System.out.println("Yes");
        else System.out.println("No"); a && b a b 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) throws Exception {
        
        Scanner scn = new Scanner(System.in);
        String str = scn.nextLine();
        Boolean a = str.charAt(2) == (str.charAt(3));
        Boolean b = str.charAt(4) == (str.charAt(5));
        if(a && b) System.out.println("Yes");
        else System.out.println("No");
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner scn = new Scanner(System.in);
        String str = scn.nextLine();
        Boolean a = str.charAt(2) == (str.charAt(3));
        Boolean b = str.charAt(4) == (str.charAt(5));
        if(a && b) System.out.println("Yes");
        else System.out.println("No");
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner scn = new Scanner(System.in);
        String str = scn.nextLine();
        Boolean a = str.charAt(2) == (str.charAt(3));
        Boolean b = str.charAt(4) == (str.charAt(5));
        if(a && b) System.out.println("Yes");
        else System.out.println("No");
    }
}
