import java.util.*;

public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        char s3 = s.charAt(2);
        char s4 = s.charAt(3);
        char s5 = s.charAt(4);
        char s6 = s.charAt(5);
        if((s3==s4)&&(s5==s6)){
            System.out.println("Yes");
        }else {
            System.out.println("No");
        }


    }
}

/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