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

Ex Input:
Sentence: 'a pizza with sauce and very little cheese arranged on a table'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a home office features full bookcase a laptop and a red leather chair'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a teddy bear is strapped into a seat'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2