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

Ex Input:
Sentence: 'a folding table sitting in a kitchen with a window behind the sink'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex 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.

Ex Output:
3


Ex Input:
Sentence: 'a group of large gray elephants walking through a forest'. Count the occurrences of the word 'large' in the given sentence.

Ex Output:

1