function solve ([str]) {
  let words = {}
  for (let i = 0; i < str.length; i++) {
    let word = []

    let code = str[i].charCodeAt(0)

    while (
      i < str.length &&
      ((code >= 65 && code <= 90) ||
        (code >= 97 && code <= 122) ||
        (code >= 48 && code <= 57) ||
        code === 95)
    ) {
      word.push(String.fromCharCode(code))
      i++
      if (i < str.length) {
        code = str[i].charCodeAt(0)
      }
    }
    word = word.join('')

    if (word.length > 0) {
      if (!words.hasOwnProperty(word)) {
        words[word] = 0
      }

      words[word]++
    }
  }

  console.log(JSON.stringify(words))
}