'use strict';

const lines = require("fs").readFileSync("/dev/stdin", "utf8").trim().split("");
let answer = "Yes";

for (let i = 0; i < lines.length; i++) {
let count = 0;
//同じ文字を数える
lines.forEach(letter => {
if (lines[i] === letter)
count++;
});
//数えた数が奇数ならNoを返して抜ける
if (count % 2 === 1) {
answer = "No";
break;
}
}
console.log(answer);