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

Ex Input:
Sentence: 'a dog is sleeping in a bed underneath a desk'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a traffic light above a street near a building'. Count the occurrences of the word 'above' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a small child sitting in a seat with a bag'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3