// No sorceries shall prevail. //           
import java.util.*;
import java.io.*;
public class Main {
	
	static long gcd(long a, long b) { 
	      if (b == 0) 
	        return a; 
	      return gcd(b, a % b);  
	    }
	static int gcd(int a, int b) { 
	      if (b == 0) 
	        return a; 
	      return gcd(b, a % b);  
	    }
	
	static long mod = 1000000007;
	public static void main(String args[]) {
		Scanner inp=new Scanner(System.in);
		PrintWriter out=new PrintWriter(System.out);
		
		String s=inp.next();
    	int n=s.length();
    	out.println(s.charAt(2)==s.charAt(3) && s.charAt(4)==s.charAt(5)?"Yes":"No");
		
		out.close();
		inp.close();
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz