function getTokens(rawString) {
  // NB: `.filter(Boolean)` removes any falsy items from an array
  // we receive a string, .toLowerCase makes it all toLowerCase
  // split() returns an array of strings seporated on what we passed into it. so breaking it up into words
  // finally .sort() sorts alphabetically
  return rawString.toLowerCase().split(/[ ,!.";:-]+/).filter(Boolean).sort();
}

//
function mostFrequentWord(text) {     // pass in a string variable
  let words = getTokens(text);        // send string variable to the getTokens function and recieve an array of words, this array is sorted alphabetically
  let wordFrequencies = {};   // Create an object with no properties
  for (let i = 0; i <= words.length; i++) {     // Loop through our array
    if (words[i] in wordFrequencies) {          // if the word is already a key in our object
      wordFrequencies[words[i]]++;                // then increment the value
    } else {                                    // if it isn't already a key in our object
      wordFrequencies[words[i]] = 1;              // then create it and set its value to 1
    }
  }
  let currentMaxKey = Object.keys(wordFrequencies)[0];    // create a variable and assign the name of the first key (or word) to it
  let currentMaxCount = wordFrequencies[currentMaxKey];   // create a variable and assign the value of that first key to it

  for (let word in wordFrequencies) {                     // loop through the object
    if (wordFrequencies[word] > currentMaxCount) {        // if the value is higher than the current max
      currentMaxKey = word;                               // reset the highest variables to these values
      currentMaxCount = wordFrequencies[word];
    }
  }
  return currentMaxKey;         // return the name of the key that has the highest value. In other words . . .    the word that shows up the most in the paragraph sent to us.
}