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

  let answer = "Yes";

  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);

}
