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

Ex Input:
Sentence: 'a child in a blue helmet standing on a skateboard indoors'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'train cars lined up under a bridge full of traffic'. Count the occurrences of the word 'under' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a sickly looking white hose inside of a stable'. Count the occurrences of the word 'inside' in the given sentence.

Ex Output:

1