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

Ex Input:
Sentence: 'a man in a hat is at a table with his laptop'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'an image of two people playing a video game'. Count the occurrences of the word 'people' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a freckled white horse standing in a grassy area'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2