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

Input: Consider Input: Sentence: 'a white dog with a black eye laying on a blanket'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a long counter in a shop with several bike tires hanging from the ceiling'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a man in a green suit and green shirt with a white litup tie'. Count the occurrences of the word 'a' in the given sentence.


Output: 3