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

Ex Input:
Sentence: 'a man cutting a cake at a party'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a person with a scarf on their head sitting on a bench next to flowers with their hand raised'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a man standing under a ball on top of a grass covered field'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3