import java.util.Scanner;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
  	String str=sc.next();
    char c[]=new char[200]; 
    char[] s=str.toCharArray();
    if(s[2]==s[3]&&s[4]==s[5]){
      System.out.print("Yes");
    }else{
      System.out.print("No");
    }
  }
} import java.util.Scanner; Scanner java.util public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
  	String str=sc.next();
    char c[]=new char[200]; 
    char[] s=str.toCharArray();
    if(s[2]==s[3]&&s[4]==s[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[]=new char[200]; 
    char[] s=str.toCharArray();
    if(s[2]==s[3]&&s[4]==s[5]){
      System.out.print("Yes");
    }else{
      System.out.print("No");
    }
  } main {
    Scanner sc = new Scanner(System.in);
  	String str=sc.next();
    char c[]=new char[200]; 
    char[] s=str.toCharArray();
    if(s[2]==s[3]&&s[4]==s[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[]=new char[200]; c new char[200] 200 char[] s=str.toCharArray(); s str.toCharArray() str.toCharArray str if(s[2]==s[3]&&s[4]==s[5]){
      System.out.print("Yes");
    }else{
      System.out.print("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.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[]=new char[200]; 
    char[] s=str.toCharArray();
    if(s[2]==s[3]&&s[4]==s[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[]=new char[200]; 
    char[] s=str.toCharArray();
    if(s[2]==s[3]&&s[4]==s[5]){
      System.out.print("Yes");
    }else{
      System.out.print("No");
    }
  }
} Main
import java.util.Scanner;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
  	String str=sc.next();
    char c[]=new char[200]; 
    char[] s=str.toCharArray();
    if(s[2]==s[3]&&s[4]==s[5]){
      System.out.print("Yes");
    }else{
      System.out.print("No");
    }
  }
}