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

Ex Input:
Sentence: 'a man and boy blow out a candle on a birthday cake'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a very distant high up view in the sky of a land mass'. Count the occurrences of the word 'very' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a stack of items that starts with a book and ends with a battery'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3