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

Input: Consider Input: Sentence: 'three elephants standing between a fence and a road'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a red and yellow striped trailer next to a white obelisk statue in a park'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a picture of a vase with pink flowers in it'. Count the occurrences of the word 'a' in the given sentence.


Output: 2