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

Input: Consider Input: Sentence: 'a desktop computers sitting on a desk next to a laptop'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a zebra crossing the road in to the grass'. Count the occurrences of the word 'in' in the given sentence.

Output: 1


Input: Consider Input: Sentence: 'a man cutting a cake at a party'. Count the occurrences of the word 'a' in the given sentence.


Output: 3