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

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] s = br.readLine().toCharArray();
		br.close();

		if (s[2] == s[3] && s[4] == s[5]) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] s = br.readLine().toCharArray();
		br.close();

		if (s[2] == s[3] && s[4] == s[5]) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} Main public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] s = br.readLine().toCharArray();
		br.close();

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

		if (s[2] == s[3] && s[4] == s[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)) char[] s = br.readLine().toCharArray(); s br.readLine().toCharArray() br.readLine().toCharArray br.readLine() br.readLine br br.close() br.close br if (s[2] == s[3] && s[4] == s[5]) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} s[2] == s[3] && s[4] == s[5] s[2] == s[3] s[2] s 2 s[3] s 3 s[4] == s[5] s[4] s 4 s[5] 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 public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] s = br.readLine().toCharArray();
		br.close();

		if (s[2] == s[3] && s[4] == s[5]) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] s = br.readLine().toCharArray();
		br.close();

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

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] s = br.readLine().toCharArray();
		br.close();

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