import java.util.Scanner;
public class Main {
 public static void main(String[] a) {
   Scanner in = new Scanner(System.in);
   char[] s = in.next().toCharArray();
   if (s[2] == s[3] && s[4] == s[5]) {
     System.out.println("Yes");
   }
   else {
     System.out.println("No");
   }
 }
} import java.util.Scanner; Scanner java.util public class Main {
 public static void main(String[] a) {
   Scanner in = new Scanner(System.in);
   char[] s = in.next().toCharArray();
   if (s[2] == s[3] && s[4] == s[5]) {
     System.out.println("Yes");
   }
   else {
     System.out.println("No");
   }
 }
} Main public static void main(String[] a) {
   Scanner in = new Scanner(System.in);
   char[] s = in.next().toCharArray();
   if (s[2] == s[3] && s[4] == s[5]) {
     System.out.println("Yes");
   }
   else {
     System.out.println("No");
   }
 } main {
   Scanner in = new Scanner(System.in);
   char[] s = in.next().toCharArray();
   if (s[2] == s[3] && s[4] == s[5]) {
     System.out.println("Yes");
   }
   else {
     System.out.println("No");
   }
 } Scanner in = new Scanner(System.in); in new Scanner(System.in) char[] s = in.next().toCharArray(); s in.next().toCharArray() in.next().toCharArray in.next() in.next in 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[] a a public class Main {
 public static void main(String[] a) {
   Scanner in = new Scanner(System.in);
   char[] s = in.next().toCharArray();
   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[] a) {
   Scanner in = new Scanner(System.in);
   char[] s = in.next().toCharArray();
   if (s[2] == s[3] && s[4] == s[5]) {
     System.out.println("Yes");
   }
   else {
     System.out.println("No");
   }
 }
} Main
import java.util.Scanner;
public class Main {
 public static void main(String[] a) {
   Scanner in = new Scanner(System.in);
   char[] s = in.next().toCharArray();
   if (s[2] == s[3] && s[4] == s[5]) {
     System.out.println("Yes");
   }
   else {
     System.out.println("No");
   }
 }
}