#include <iostream>
#include <cstdio>
using namespace std;

#define MAX_N 105

char str[MAX_N];
int len,t;
bool ok;

int main(){
    scanf("%s",str);
    ok = true;
    t = 1;
    len=(int)strlen(str);
    sort(str,str+len);
    for(int i = 0;i < len;i++){
        if(str[i] == str[i+1]) {
            t++;
        }
        else if(t%2){
            ok = false;
            break;
        }
        else{
            t = 1;
        }
    }
    if(ok)  cout<<"Yes"<<endl;
    else    cout<<"No"<<endl;
    return 0;
}