#Open the file romeo.txt and read it line by line. 
#For each line, split the line into a list of words using the split() method. 
#The program should build a list of words.
#For each word on each line check to see if the word is already in the list and if not append it to the list. 
#When the program completes, sort and print the resulting words in alphabetical order. 
fname = input("Enter file name: ")
fh = open(fname)
lst = list()
for line in fh:
    word = line.rstrip().split()
    for element in word:
        if element  not in lst:
            lst.append(element)
print(lst.sort())


