wordsplit javascript coderbyte

function WordSplit(strArr) {
  const firstComparisonString = strArr[0]
  const dictionaryItems = strArr[1].split(',')

  let result = 'not possible'

  for (let i = 0; i <= firstComparisonString.length; i++) {
    const firstMatch = firstComparisonString.substring(0, i)
    const lastMatch = firstComparisonString.substring(i, firstComparisonString.length)
    if (dictionaryItems.includes(firstMatch) && dictionaryItems.includes(lastMatch)) {
      result = `${firstMatch},${lastMatch}`
      break
    }
  }

  return result
}

// keep this function call here
console.log(WordSplit(readline()));