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

Ex Input:
Sentence: 'a girl in a bathing suit with a pink umbrella'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a child in a blue helmet standing on a skateboard indoors'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a little girl is sitting down holding a hair dryer'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2