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

Ex Input:
Sentence: 'two teams compete at a sport in a park'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a desk with a laptop next to a cutting board'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a green tour bus parked next to a palm tree'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2