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

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 group of elephants marches down the city street in front of a large building'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a woman sits on a fence alongside a city street'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3