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

Input: Consider Input: Sentence: 'a woman and a cat are sitting at a laptop'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a wooden rail covered in snowboards on a snow covered mountain'. Count the occurrences of the word 'covered' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a triple decker purple bus driving down a street'. Count the occurrences of the word 'a' in the given sentence.


Output: 2