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

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		char[] ch = br.readLine().toCharArray();
		
		if(ch[2] == ch[3] && ch[4] == ch [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 {

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

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

} public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		char[] ch = br.readLine().toCharArray();
		
		if(ch[2] == ch[3] && ch[4] == ch [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 {

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

}