# Write a Python program to Remove all duplicates words from a given sentence 
from collections import Counter


def remov_duplicates(input):


    # split input string separated by space
    input = input.split(" ")


    # joins two adjacent elements in iterable way
    for i in range(0, len(input)):
        input[i] = "".join(input[i])


    # now create dictionary using counter method
    # which will have strings as key and their
    # frequencies as value
    UniqW = Counter(input)


    # joins two adjacent elements in iterable way
    s = " ".join(UniqW.keys())
    print (s)


# Driver program
if __name__ == "__main__":
    input = 'Python is great and Java is also great'
    remov_duplicates(input)