#include<stdio.h>
int alpha[26];
int main()
{
    char c;
    int i;
    while(scanf("%c", &c))
    {
        if(c=='\n') break;
        if(c>='A'&&c<='Z')
            alpha[c-'A']++;
        else
            alpha[c-'a']++;
    }
    for(i=0 ; i<26 ; i++)
    {
        if(alpha[i]%2!=0)
        {
            printf("No\n");
            return 0;
        }
    }
    printf("Yes\n");
    return 0;
}
