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

Input: Consider Input: Sentence: 'a man and a woman in a spare living room space standing far apart from each other'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a large clock mounted to the side of a tall building'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a person is on a surfboard riding waves'. Count the occurrences of the word 'a' in the given sentence.


Output: 2