import java.io.*;

public class Main {
  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    char[] s = br.readLine().toCharArray();
    if (s[2] == s[3] && s[4] == s[5]){
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  }
} import java.io.*; io.* java public class Main {
  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    char[] s = br.readLine().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[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    char[] s = br.readLine().toCharArray();
    if (s[2] == s[3] && s[4] == s[5]){
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  } main {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    char[] s = br.readLine().toCharArray();
    if (s[2] == s[3] && s[4] == s[5]){
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) char[] s = br.readLine().toCharArray(); s br.readLine().toCharArray() br.readLine().toCharArray br.readLine() br.readLine br 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[] args args public class Main {
  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    char[] s = br.readLine().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[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    char[] s = br.readLine().toCharArray();
    if (s[2] == s[3] && s[4] == s[5]){
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  }
} Main
import java.io.*;

public class Main {
  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    char[] s = br.readLine().toCharArray();
    if (s[2] == s[3] && s[4] == s[5]){
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  }
}
