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

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

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

longest_word_seen_so_far = ''  # String Accumulator (this will be set to the longest word)
# Could have also set it to the first word like this: longest_word_seen_so_far = words[0]
# consider the words one by one

for word in words :

    # 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

    word_length = len( word )
    guess_length = len( longest_word_seen_so_far )
    if ( word_length > guess_length ):  # if we find a word that has a longer length than the longest word seen so far set
        longest_word_seen_so_far = word # replace the longest word with the word we saw was longer
       # print( 'New longest word:', longest_word_seen_so_far )
    # else: # this does nothing so you don't need it
    #     pass

# longest word so far must be longest as considered every word as a possibility

# print longest word
print( longest_word_seen_so_far )