function main(input) {
  const S = input.split('');
  let data = {};
  let flg = 'Yes';
  
  for (let i = 0; i < S.length; i++) {
    key = S[i];
    if (data[key] === undefined) {
      data[key] = 1;
    } else {
      data[key] += 1;
    }
  }
  
  for (key in data) {
    if (data[key] % 2 !== 0) { flg = 'No'; }
  }
  
  console.log(flg);
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'));