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