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

Input: Consider Input: Sentence: 'a row of red and blue trucks parked in a parking lot'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a white toilet sitting under a window next to a bath tub'. Count the occurrences of the word 'white' in the given sentence.

Output: 1


Input: Consider Input: Sentence: 'a bench sitting on top of a grass covered yard'. Count the occurrences of the word 'a' in the given sentence.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Output: 2


