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

Input: Consider Input: Sentence: 'a skate park with a young man on a skate board going down a concrete beam'. Count the occurrences of the word 'a' in the given sentence.

Output: 4


Input: Consider Input: Sentence: 'some baseball players on a field playing baseball'. Count the occurrences of the word 'playing' in the given sentence.

Output: 1


Input: Consider Input: Sentence: 'an elephant on a dirt ground in front of a canvas'. Count the occurrences of the word 'in' in the given sentence.


Output: 1