I have 2 lists such as this:

```
>>>first = ['hello', 'hey', 'hi', 'hey']
>>>second = ['hey', 'hi', 'hello']

```

I want a new list that contains the word that is not included in the second list. In this case:

```
odd_word = ['hey']

```

What is the quickest way of doing this? Thank you.

I tried using the method shown here: [Get difference between two lists](https://stackoverflow.com/questions/3462143/get-difference-between-two-lists), but it gives me a blank list.

```
>>> odd = list(set(first) - set(second))
>>> odd
[]

```