import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	static int ans[];
	static int count = 0;

	public static void main(String args[]) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str[] = br.readLine().split("");

		if (str[2].equals(str[3]) && str[4].equals(str[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {

	static int ans[];
	static int count = 0;

	public static void main(String args[]) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str[] = br.readLine().split("");

		if (str[2].equals(str[3]) && str[4].equals(str[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} Main static int ans[]; ans static int count = 0; count 0 public static void main(String args[]) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str[] = br.readLine().split("");

		if (str[2].equals(str[3]) && str[4].equals(str[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} main {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str[] = br.readLine().split("");

		if (str[2].equals(str[3]) && str[4].equals(str[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str[] = br.readLine().split(""); str br.readLine().split("") br.readLine().split br.readLine() br.readLine br "" if (str[2].equals(str[3]) && str[4].equals(str[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} str[2].equals(str[3]) && str[4].equals(str[5]) str[2].equals(str[3]) str[2].equals str[2] str 2 str[3] str 3 str[4].equals(str[5]) str[4].equals str[4] str 4 str[5] 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" String args[] args public class Main {

	static int ans[];
	static int count = 0;

	public static void main(String args[]) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str[] = br.readLine().split("");

		if (str[2].equals(str[3]) && str[4].equals(str[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} public class Main {

	static int ans[];
	static int count = 0;

	public static void main(String args[]) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str[] = br.readLine().split("");

		if (str[2].equals(str[3]) && str[4].equals(str[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	static int ans[];
	static int count = 0;

	public static void main(String args[]) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str[] = br.readLine().split("");

		if (str[2].equals(str[3]) && str[4].equals(str[5])) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
}
