        import java.util.*;
                 
        class Main{
            public static void main(String[] args) {
                
                try(Scanner sc = new Scanner(System.in)){
         
                    String str = sc.next();
                    String str3 = str.substring(2, 3);
                    String str4 = str.substring(3, 4);
         
                    String str5 = str.substring(4, 5);
                    String str6 = str.substring(5, 6);
         
                    if(str3.equals(str4) && str5.equals(str6))System.out.println("Yes");
                    else System.out.println("No");
                    
                }catch(Exception e){
                    e.printStackTrace();
                }        
            }
        }
/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