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

Input: Consider Input: Sentence: 'a black cat lying in an empty suitcase peers out over the edge of the suitcase'. Count the occurrences of the word 'black' in the given sentence.

Output: 1


Input: Consider Input: Sentence: 'a man riding a long surfboard on a wave'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a man drinking from a glass standing next to a wine glass'. Count the occurrences of the word 'a' in the given sentence.


Output: 3