import java.util.*;
public class Main {
    static final long MODVAL = 998244353L;
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
//        System.out.println(S.charAt(3));
        boolean flag = (S.charAt(2) == S.charAt(3)) && (S.charAt(4) == S.charAt(5));
        System.out.println(flag ? "Yes" : "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