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

Input: Consider Input: Sentence: 'a small train engine pulling a freight car'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a man riding skis on a snow covered ski slope'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a deep dish pizza and a bottle sit on a table'. Count the occurrences of the word 'a' in the given sentence.


Output: 3