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

Input: Consider Input: Sentence: 'a child laying on a bed with his head hanging up side down and a teddy bear leaning against the bed'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'there is a pizza with onions mushrooms and peppers'. Count the occurrences of the word 'mushrooms' in the given sentence.

Output: 1


Input: Consider Input: Sentence: 'a man on a machine next to an airplane'. Count the occurrences of the word 'a' in the given sentence.


Output: 2