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

Input: Consider Input: Sentence: 'a couple of zebras walk into a open area'. Count the occurrences of the word 'walk' in the given sentence.

Output: 1


Input: Consider Input: Sentence: 'close up of a garden with shrubs growing'. Count the occurrences of the word 'of' in the given sentence.

Output: 1


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