import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String S = sc.next();

        if(S.length() < 6){
            System.out.print("No");
        }else{
            if(S.charAt(2) == S.charAt(3) && S.charAt(4) == S.charAt(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