import java.util.*;
class Main {
 
    public static void main(String[] args) {
        int t, n, l;
        Scanner s = new Scanner(System.in);
        String str = s.next();
        if(str.charAt(2)==str.charAt(3) && str.charAt(4)==str.charAt(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