// C++ includes used for precompiling -*- C++ -*-

// Copyright (C) 2003-2013 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file stdc++.h
 *  This is an implementation file for a precompiled header.
 */

// 17.4.1.2 Headers

// C
#ifndef _GLIBCXX_NO_ASSERT
#include <cassert>
#endif
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>

#if __cplusplus >= 201103L
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
#endif

// C++
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>

#if __cplusplus >= 201103L
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#endif

/*全てのライブラリをインクルード*/
#define rep(i, n) for (int i = 0; i < (n); ++i)
using namespace std;

int main()
{
    int a[26] = {};
    string s;
    getline(cin, s);
    int n = s.size();
    rep(i, n)
    {
        if (s[i] == 'a' || s[i] == 'a' - 32)
            a[0]++;
        if (s[i] == 'b' || s[i] == 'b' - 32)
            a[1]++;
        if (s[i] == 'c' || s[i] == 'c' - 32)
            a[2]++;
        if (s[i] == 'd' || s[i] == 'd' - 32)
            a[3]++;
        if (s[i] == 'e' || s[i] == 'e' - 32)
            a[4]++;
        if (s[i] == 'f' || s[i] == 'f' - 32)
            a[5]++;
        if (s[i] == 'g' || s[i] == 'g' - 32)
            a[6]++;
        if (s[i] == 'h' || s[i] == 'h' - 32)
            a[7]++;
        if (s[i] == 'i' || s[i] == 'i' - 32)
            a[8]++;
        if (s[i] == 'j' || s[i] == 'j' - 32)
            a[9]++;
        if (s[i] == 'k' || s[i] == 'k' - 32)
            a[10]++;
        if (s[i] == 'l' || s[i] == 'l' - 32)
            a[11]++;
        if (s[i] == 'm' || s[i] == 'm' - 32)
            a[12]++;
        if (s[i] == 'n' || s[i] == 'n' - 32)
            a[13]++;
        if (s[i] == 'o' || s[i] == 'o' - 32)
            a[14]++;
        if (s[i] == 'p' || s[i] == 'p' - 32)
            a[15]++;
        if (s[i] == 'q' || s[i] == 'q' - 32)
            a[16]++;
        if (s[i] == 'r' || s[i] == 'r' - 32)
            a[17]++;
        if (s[i] == 's' || s[i] == 's' - 32)
            a[18]++;
        if (s[i] == 't' || s[i] == 't' - 32)
            a[19]++;
        if (s[i] == 'u' || s[i] == 'u' - 32)
            a[20]++;
        if (s[i] == 'v' || s[i] == 'v' - 32)
            a[21]++;
        if (s[i] == 'w' || s[i] == 'w' - 32)
            a[22]++;
        if (s[i] == 'x' || s[i] == 'x' - 32)
            a[23]++;
        if (s[i] == 'y' || s[i] == 'y' - 32)
            a[24]++;
        if (s[i] == 'z' || s[i] == 'z' - 32)
            a[25]++;
    }
    rep(i,26){
        if(a[i]%2!=0)break;
        if(i==25){
            cout<<"Yes"<<endl;
            return 0;
        }
        else continue;
    }
    cout<<"No"<<endl;
    return 0;
}

Measured memory_bytes: 3600