'use strict';

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

let answer = "Yes"+"\n";

if (lines.length % 2 == 0) {
  for (let i = 0; i < lines.length; i++) {
    let count = 0;
    lines.forEach(num => {
      if (lines[i] == num) {
        count++;
      }
    });
    if (count % 2 != 0) {
      answer = "No";
      break;
    }
  }
} else {
  answer = "No";
}
console.log(answer);

