Said-FD

const solution = (str, num) => {
  if (num < 1 || num > 500) return 'Characters length is out of the range'

  const wordsArr = str.split(' ')
  const wordsLengthArr = wordsArr.map(word => word.length)

  let resultArr = []
  let temp = ''

  wordsArr.forEach((word, index) => {