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

Input: Consider Input: Sentence: 'a woman is riding a wave on a surfboard'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'picture of a tab tub where the wall is open exposing wood studs and a shop vacuum is in the tub'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a cat standing next to a computer keyboard'. Count the occurrences of the word 'to' in the given sentence.


Output: 1