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

Input: Consider Input: Sentence: 'a man on a flat truck is behind a large group of farm animals'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a toddler and baby on a wooden floor scatter with papers'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a railway crossing sign that warns onlookers to stop'. Count the occurrences of the word 'onlookers' in the given sentence.


Output: 1