import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String str = sc.nextLine();
		sc.close();
		
		//3文字目と4文字目が等しい
		if(str.charAt(2) == str.charAt(3)) {
			if(str.charAt(4) == str.charAt(5)) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			}
		}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 str = sc.nextLine();
		sc.close();
		
		//3文字目と4文字目が等しい
		if(str.charAt(2) == str.charAt(3)) {
			if(str.charAt(4) == str.charAt(5)) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			}
		}else {
			System.out.println("No");
		}
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String str = sc.nextLine();
		sc.close();
		
		//3文字目と4文字目が等しい
		if(str.charAt(2) == str.charAt(3)) {
			if(str.charAt(4) == str.charAt(5)) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			}
		}else {
			System.out.println("No");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		String str = sc.nextLine();
		sc.close();
		
		//3文字目と4文字目が等しい
		if(str.charAt(2) == str.charAt(3)) {
			if(str.charAt(4) == str.charAt(5)) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			}
		}else {
			System.out.println("No");
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String str = sc.nextLine(); str sc.nextLine() sc.nextLine sc sc.close() sc.close sc if(str.charAt(2) == str.charAt(3)) {
			if(str.charAt(4) == str.charAt(5)) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			}
		}else {
			System.out.println("No");
		} str.charAt(2) == str.charAt(3) str.charAt(2) str.charAt str 2 str.charAt(3) str.charAt str 3 {
			if(str.charAt(4) == str.charAt(5)) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			}
		} if(str.charAt(4) == str.charAt(5)) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			} str.charAt(4) == str.charAt(5) str.charAt(4) str.charAt str 4 str.charAt(5) str.charAt str 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" {
			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 str = sc.nextLine();
		sc.close();
		
		//3文字目と4文字目が等しい
		if(str.charAt(2) == str.charAt(3)) {
			if(str.charAt(4) == str.charAt(5)) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			}
		}else {
			System.out.println("No");
		}
	}
} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String str = sc.nextLine();
		sc.close();
		
		//3文字目と4文字目が等しい
		if(str.charAt(2) == str.charAt(3)) {
			if(str.charAt(4) == str.charAt(5)) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			}
		}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 str = sc.nextLine();
		sc.close();
		
		//3文字目と4文字目が等しい
		if(str.charAt(2) == str.charAt(3)) {
			if(str.charAt(4) == str.charAt(5)) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			}
		}else {
			System.out.println("No");
		}
	}
}