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