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

Input: Consider Input: Sentence: 'a girl riding a bike wth a dog chasing her'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a little girl laying on a bed holding a brown teddy bear'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a single lone cup of coffee sitting on a black park bench'. Count the occurrences of the word 'a' in the given sentence.


Output: 2