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

Input: Consider Input: Sentence: 'a person holding up a smart phone in front of a singer'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a person jumping in the air on a skateboard'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a small child and older adult sitting on a couch reading a magazine'. Count the occurrences of the word 'a' in the given sentence.


Output: 3