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

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

Output: 3


Input: Consider Input: Sentence: 'a white and gray cat is in a bathroom sink'. Count the occurrences of the word 'white' in the given sentence.

Output: 1


Input: Consider Input: Sentence: 'a tennis racket leaning against the net and three tennis balls next to it'. Count the occurrences of the word 'tennis' in the given sentence.


Output: 2