import java.util.*;

public class Main{
      public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            String str = sc.next();
            String[] str2 = str.split("");
            if(str2[2].equals(str2[3]) && str2[4].equals(str2[5])){
              System.out.println("Yes");
            } else {
              System.out.println("No");
            }
      }
} import java.util.*; util.* java public class Main{
      public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            String str = sc.next();
            String[] str2 = str.split("");
            if(str2[2].equals(str2[3]) && str2[4].equals(str2[5])){
              System.out.println("Yes");
            } else {
              System.out.println("No");
            }
      }
} Main public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            String str = sc.next();
            String[] str2 = str.split("");
            if(str2[2].equals(str2[3]) && str2[4].equals(str2[5])){
              System.out.println("Yes");
            } else {
              System.out.println("No");
            }
      } main {
            Scanner sc = new Scanner(System.in);
            String str = sc.next();
            String[] str2 = str.split("");
            if(str2[2].equals(str2[3]) && str2[4].equals(str2[5])){
              System.out.println("Yes");
            } else {
              System.out.println("No");
            }
      } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String str = sc.next(); str sc.next() sc.next sc String[] str2 = str.split(""); str2 str.split("") str.split str "" if(str2[2].equals(str2[3]) && str2[4].equals(str2[5])){
              System.out.println("Yes");
            } else {
              System.out.println("No");
            } str2[2].equals(str2[3]) && str2[4].equals(str2[5]) str2[2].equals(str2[3]) str2[2].equals str2[2] str2 2 str2[3] str2 3 str2[4].equals(str2[5]) str2[4].equals str2[4] str2 4 str2[5] str2 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[] args args public class Main{
      public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            String str = sc.next();
            String[] str2 = str.split("");
            if(str2[2].equals(str2[3]) && str2[4].equals(str2[5])){
              System.out.println("Yes");
            } else {
              System.out.println("No");
            }
      }
} public class Main{
      public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            String str = sc.next();
            String[] str2 = str.split("");
            if(str2[2].equals(str2[3]) && str2[4].equals(str2[5])){
              System.out.println("Yes");
            } else {
              System.out.println("No");
            }
      }
} Main
import java.util.*;

public class Main{
      public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            String str = sc.next();
            String[] str2 = str.split("");
            if(str2[2].equals(str2[3]) && str2[4].equals(str2[5])){
              System.out.println("Yes");
            } else {
              System.out.println("No");
            }
      }
}