import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner tan = new Scanner(System.in);
        int i=0;
        String st=tan.next();
        char []c=new char[st.length()];
        for(char ch : st.toCharArray()){
            c[i]=ch;
            i++;
        }
        if(c[2]==c[3] && c[4]==c[5])
            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