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

Ex Input:
Sentence: 'a man riding a long surfboard on a wave'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a man eats food at a bench in front of a boat'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a young boy preparing his baseball mitt before his game'. Count the occurrences of the word 'his' in the given sentence.

Ex Output:

2