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

Input: Consider Input: Sentence: 'a colorful photo of a bike against a fence with mountains in the back'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a young man cutting a pizza on top of a table'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a trunk of a tree has a sign that reads love trees'. Count the occurrences of the word 'a' in the given sentence.


Output: 3