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

Input: Consider Input: Sentence: 'a tall plant protrudes from a glass vase'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a man and boy blow out a candle on a birthday cake'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a kid is riding a bike down a narrow street'. Count the occurrences of the word 'a' in the given sentence.


Output: 3