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

Ex Input:
Sentence: 'a cat is standing on a green bench looking on'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'group of old women sitting at a restaurant dinner table together'. Count the occurrences of the word 'old' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a propeller plane that is parked in a hanger'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2