#include <cstdio>
#include <map>

int main()
{
  char s[101];
  scanf("%s", s);
  std::map<char, int> m;
  for (char* p = s; *p; ++p)
  {
    m[*p]++;
  }
  for (auto &p : m)
  {
    if (p.second & 1)
    {
      puts("No");
      return 0;
    }
  }
  puts("Yes");
  return 0;
}