function makeAnagram(a, b) {
  let firstArr = [...a].sort()
  let secondArr = [...b].sort()

  let numDel = 0
  let i = 0

  while (i < firstArr.length) {
    const first = firstArr[i]
    const second = secondArr[i]
    if (first !== second) {
      numDel++
      if (first > second) {
        secondArr.splice(i, 1)
      } else {
        firstArr.splice(i, 1)
      }
    } else {
      i++
    }
  }

  if (firstArr.length !== secondArr.length)
    numDel += Math.abs(secondArr.length - firstArr.length)
    
  return numDel
}