import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
      	if(s.length() != 6) {
          return;
        }
      //coffee
      	String s2 = s.substring(2,3);
        String s3 = s.substring(3,4);
      	String s4 = s.substring(4,5);
      	String s5 = s.substring(5,6);
      
        if(s2.equals(s3) && s4.equals(s5)) {
        	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 s = sc.next();
      	if(s.length() != 6) {
          return;
        }
      //coffee
      	String s2 = s.substring(2,3);
        String s3 = s.substring(3,4);
      	String s4 = s.substring(4,5);
      	String s5 = s.substring(5,6);
      
        if(s2.equals(s3) && s4.equals(s5)) {
        	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();
      	if(s.length() != 6) {
          return;
        }
      //coffee
      	String s2 = s.substring(2,3);
        String s3 = s.substring(3,4);
      	String s4 = s.substring(4,5);
      	String s5 = s.substring(5,6);
      
        if(s2.equals(s3) && s4.equals(s5)) {
        	System.out.println("Yes");
        }else {
        	System.out.println("No");
        }
    } main {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
      	if(s.length() != 6) {
          return;
        }
      //coffee
      	String s2 = s.substring(2,3);
        String s3 = s.substring(3,4);
      	String s4 = s.substring(4,5);
      	String s5 = s.substring(5,6);
      
        if(s2.equals(s3) && s4.equals(s5)) {
        	System.out.println("Yes");
        }else {
        	System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc if(s.length() != 6) {
          return;
        } s.length() != 6 s.length() s.length s 6 {
          return;
        } return; String s2 = s.substring(2,3); s2 s.substring(2,3) s.substring s 2 3 String s3 = s.substring(3,4); s3 s.substring(3,4) s.substring s 3 4 String s4 = s.substring(4,5); s4 s.substring(4,5) s.substring s 4 5 String s5 = s.substring(5,6); s5 s.substring(5,6) s.substring s 5 6 if(s2.equals(s3) && s4.equals(s5)) {
        	System.out.println("Yes");
        }else {
        	System.out.println("No");
        } s2.equals(s3) && s4.equals(s5) s2.equals(s3) s2.equals s2 s3 s4.equals(s5) s4.equals s4 s5 {
        	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 s = sc.next();
      	if(s.length() != 6) {
          return;
        }
      //coffee
      	String s2 = s.substring(2,3);
        String s3 = s.substring(3,4);
      	String s4 = s.substring(4,5);
      	String s5 = s.substring(5,6);
      
        if(s2.equals(s3) && s4.equals(s5)) {
        	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 s = sc.next();
      	if(s.length() != 6) {
          return;
        }
      //coffee
      	String s2 = s.substring(2,3);
        String s3 = s.substring(3,4);
      	String s4 = s.substring(4,5);
      	String s5 = s.substring(5,6);
      
        if(s2.equals(s3) && s4.equals(s5)) {
        	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 s = sc.next();
      	if(s.length() != 6) {
          return;
        }
      //coffee
      	String s2 = s.substring(2,3);
        String s3 = s.substring(3,4);
      	String s4 = s.substring(4,5);
      	String s5 = s.substring(5,6);
      
        if(s2.equals(s3) && s4.equals(s5)) {
        	System.out.println("Yes");
        }else {
        	System.out.println("No");
        }
    }
}