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