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

Input: Consider Input: Sentence: 'a colorful hydrant  sitting in the grass on a quiet street'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a hotdog with a bite taken out on a napkin'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a living room with a cat setting on a chair in the middle'. Count the occurrences of the word 'a' in the given sentence.


Output: 3