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

Ex Input:
Sentence: 'a dog stares into a camera inside of a car'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'two sets of washers and dryers sitting in front of a kitchen'. Count the occurrences of the word 'of' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a picture of a man in a suit tie and hat'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3