#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.
#You can download the sample data at http://www.py4e.com/code3/romeo.txt

fname = input("Enter file name: ")
fh = open(fname)
lst = list()
temp= list()

for line in fh:
    temp=line.split()
    for i in range(len(temp)):
        if not temp[i] in lst:
            lst.append(temp[i])
    

print(lst.sort)
