''' Purpose: find the words of maximum length in user text
'''

# get the words
reply = input( 'Enter text: ' )
words = reply.split()

# consider the words one by one to find a longest word
longest_seen = ""                       # so far nothing has been seen

for word in words :                     # consider each word in turn
    nw = len( word )                    # get its length
    nl = len( longest_seen )            # get the length of the longest seen so far

    if ( nl < nw ) :                    # compare the two lengths
        longest_seen = word             # if current word is longer, update longest seen

# determine the words of longest length
longest_words = []

...

# print result

print( longest_words )