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

Ex Input:
Sentence: 'a person jumping in the air on a skateboard'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a metal counter in a kitchen with a sink'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a man in a suit is skateboarding down the road'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2