In this task, you need to count the occurrences of the given word in the given sentence.

Ex Input:
Sentence: 'a home computer setup with two laptops on a desk'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a man puts his head on his cat sitting on a suitcase'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a man riding on the back of a horse through a leaf covered forest'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3