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

Ex Input:
Sentence: 'a series of street signs in french on a city street'. Count the occurrences of the word 'street' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a picture of a medical exam room with a bed and chair'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'an older man in a wheelchair is sitting on a sidewalk'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2