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

Input: Consider Input: Sentence: 'a black and white photo of an airplane being loaded'. Count the occurrences of the word 'of' in the given sentence.

Output: 1


Input: Consider Input: Sentence: 'a man on a motorcycle riding by an old rundown town and an animal on the side of the road'. Count the occurrences of the word 'on' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a man standing on some rocks holding a surfboard'. Count the occurrences of the word 'a' in the given sentence.


Output: 2