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

Input: Consider Input: Sentence: 'a pink toothbrush and a blue toothbrush sitting in a clear glass toothbrush holder by a mirror'. Count the occurrences of the word 'toothbrush' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a yellow emergency until vehicle in a parking ot'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'three different toshiba laptops with people looking at them'. Count the occurrences of the word 'looking' in the given sentence.


Output: 1