import java.util.*;

class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);    //scanner
        String s = sc.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 class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);    //scanner
        String s = sc.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 sc = new Scanner(System.in);    //scanner
        String s = sc.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 sc = new Scanner(System.in);    //scanner
        String s = sc.next();
        if(s.charAt(2)==s.charAt(3) && s.charAt(4)==s.charAt(5)){
            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 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
import java.util.*;

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