import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		StringBuilder w = new StringBuilder(sc.nextLine());
		sc.close();
		
		int index = 0;

		while (true) {

			index = w.indexOf(w.substring(0, 1),1);
			if (index == -1) {
				System.out.println("No");
				break;
			}
			
			w.delete(index, index+1);
			w.delete(0, 1);

			if (w.length() == 0) {
				System.out.println("Yes");
				break;
			}
		}
	}
}
/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