import java.util.*;

class Main{
	static public void main(String[] args){
		Scanner sc=new Scanner(System.in);
		
		String str=sc.nextLine();
		
		boolean jubge=false;
		
		if((str.charAt(2))==(str.charAt(3))
				&&(str.charAt(4))==(str.charAt(5))){
				System.out.println("Yes");	
		}
		
		else System.out.println("No");
	}
} import java.util.*; util.* java class Main{
	static public void main(String[] args){
		Scanner sc=new Scanner(System.in);
		
		String str=sc.nextLine();
		
		boolean jubge=false;
		
		if((str.charAt(2))==(str.charAt(3))
				&&(str.charAt(4))==(str.charAt(5))){
				System.out.println("Yes");	
		}
		
		else System.out.println("No");
	}
} Main static public void main(String[] args){
		Scanner sc=new Scanner(System.in);
		
		String str=sc.nextLine();
		
		boolean jubge=false;
		
		if((str.charAt(2))==(str.charAt(3))
				&&(str.charAt(4))==(str.charAt(5))){
				System.out.println("Yes");	
		}
		
		else System.out.println("No");
	} main {
		Scanner sc=new Scanner(System.in);
		
		String str=sc.nextLine();
		
		boolean jubge=false;
		
		if((str.charAt(2))==(str.charAt(3))
				&&(str.charAt(4))==(str.charAt(5))){
				System.out.println("Yes");	
		}
		
		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 boolean jubge=false; jubge false if((str.charAt(2))==(str.charAt(3))
				&&(str.charAt(4))==(str.charAt(5))){
				System.out.println("Yes");	
		}
		
		else System.out.println("No"); (str.charAt(2))==(str.charAt(3))
				&&(str.charAt(4))==(str.charAt(5)) (str.charAt(2))==(str.charAt(3)) (str.charAt(2)) str.charAt str 2 (str.charAt(3)) str.charAt str 3 (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 System.out System System.out "No" String[] args args
import java.util.*;

class Main{
	static public void main(String[] args){
		Scanner sc=new Scanner(System.in);
		
		String str=sc.nextLine();
		
		boolean jubge=false;
		
		if((str.charAt(2))==(str.charAt(3))
				&&(str.charAt(4))==(str.charAt(5))){
				System.out.println("Yes");	
		}
		
		else System.out.println("No");
	}
}