function LongestWord(sen) {

var words = sen.split(' '); // Split the user-inputted sentence into words

var counter = 0; // Create a counter to keep track of the # of letters in a word

var poleposcount = 0; // Create a pole position counter to keep track of the # of letters the longest word has

var poleposword = ''; // Create an empty string to store the longest word

for (var i = 0; i < words.length; i++){ // Create a FOR LOOP to run thru each word in the sentence. FOR EACH word...

var sideword = words[i]; // Store the current word in a side variable for later use

for (var j = 0; j < sideword.length; j++){ // Create another FOR LOOP to run thru each character in the current side word. FOR EACH character...

if (sideword[j] >= 'a' && sideword[j] <= 'z'){ // So long as the character is a letter...

counter += 1; // -> Add 1 to the counter (this counts the # of letters in the current side word)

}

if (counter > poleposcount){ // After running thru each letter, if the counter (# of letters in the current word) is greater than the pole position counter (# of letters in the longest word)...

poleposcount = counter; // -> Assign the counter as the new pole position counter (the current value for the counter becomes the value of the pole position counter)

poleposword = sideword; // -> Assign the current side word as the pole position word aka the current word becomes the current longest word (so far at least)

}

}

counter = 0; // Reset the counter at the end of the 1st FOR-LOOP

}

return poleposword; // Return the longest word