from collections import Counter
def remov_duplicates(input):
# split input string separated by space
input = input.split(" ")
# 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)