import java.util.*;

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

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