''' Purpose: find the word of the longest length amongst the input
'''

# get the words
reply = input( "Enter a series of words: " )
words = reply.split() # List of words

# need to keep track of the longest word seen so far. It's initialization
# should never prevent a word of longest length being missed

# Should we initialize the longest_word variable outside or inside?
# It should be outside (similar to an accumulator) because if you
# initialize it inside the for loop it gets reset to the initial value of the
# longest_word in the beginning for EVERY time you go through the loop
# and you don't want that. (If you have the longest word as '' inside the
# for loop, you reset the longest_word as '' each time you compare a new
# word.)


# consider the words one by one
longest_word_seen = ""

for word in words : # We are iterating through our words so our current word
    # is the word we're on in the loop! We're going one by one and comparing
    # the words to the longest_word_seen!

    # check the word out - compare its length to longest so far
    # if current word is longer than the longest word so far, need to update
                  # >= if you want the last longest word
    if (  len(word) > len(longest_word_seen)  ):
        longest_word_seen = word # longest_word_seen will become word when?

        # When the length of the current word I'm on is greater than
        # the length of the longest_word_seen!
# longest word so far must be longest as considered every word as a possibility
# print longest word
print( longest_word_seen )