countries = ['USA', 'UK', 'France', 'Romania', 'France', 'Germany', 'USA', 'Canada', 'India', 'UK']

# Removing duplicates from list by transforming it to a set and then back to a list
countries = list(set(countries))
countries.sort()    # Sorting the list in place


print(countries)    # => ['Canada', 'France', 'Germany', 'India', 'Romania', 'UK', 'USA']