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

Input: Consider Input: Sentence: 'a group of kids swimming in ocean around a man on a surfboard'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'several young men playing a game on the grass near a body of water on a chilly day'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a hand pulling a red suitcase along the floor'. Count the occurrences of the word 'a' in the given sentence.


Output: 2