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

Ex Input:
Sentence: 'a red yellow and white firetruck and some trees smoke and fire'. Count the occurrences of the word 'and' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a picture of a toilet and toilet paper in a bathroom'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a knife sitting on a tale next to a knife covering'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3