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

Input: Consider Input: Sentence: 'a man in black shirt playing a game with a nintendo wii controller'. Count the occurrences of the word 'a' in the given sentence.

Output: 3


Input: Consider Input: Sentence: 'a man in a suit pinstriped shirt and red tie'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a train pulling into a train station next to a platform'. Count the occurrences of the word 'train' in the given sentence.


Output: 2