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

Input: Consider Input: Sentence: 'a couple of elephants out in the field having a snack'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a red and yellow striped trailer next to a white obelisk statue in a park'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a man holding a frisbee in front of a teen boy with his arms up in the air'. Count the occurrences of the word 'a' in the given sentence.


Output: 3