import java.util.*;
public class Main
{
    public static void main(String[] args)
    {
        Scanner myObj = new Scanner(System.in);
        String inputStr = myObj.nextLine();
        char[] inputChar = inputStr.toCharArray();

        if (inputChar[2] == inputChar[3] && inputChar[4] == inputChar[5])
        {
            System.out.print("Yes");
        }
        else {
            System.out.print("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