solution10.py

'''
Write a program that accepts a sequence of whitespace separated words as input and prints the words after removing all duplicate words and sorting them alphanumerically.

Suppose the following input is supplied to the program:

hello world and practice makes perfect and hello world again
Then, the output should be:

again and hello makes perfect practice world
'''


args = input().split()

my_set = set(args)

sorted_set = sorted(my_set)

print(' '.join(sorted_set))