Given the task definition, example input & output, solve the new input case.
You will be given a text in the Russian language, and you should classify the given input text to one of the emotion labels from this list of emotion labels- ['joy', 'sadness', 'surprise', 'fear', 'anger']. Make sure your output label (i) is strictly present in the given list of emotion labels. (ii) is unambiguous.
Example: Кому они так необходимы, эти страдания?» А у меня спина болит, ходить больно :(
Output: sadness
The input text states the suffering of a person who is unable to walk as his back hurts. There is an emotion of 'sadness' in this text. So, the input text is labeled correctly as 'sadness'.

New input case for you: это счастье.
Output:
joy