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

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

}