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

Ex Input:
Sentence: 'a red and yellow striped trailer next to a white obelisk statue in a park'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a single lone cup of coffee sitting on a black park bench'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a building has people in front of it on the sidewalk'. Count the occurrences of the word 'building' in the given sentence.

Ex Output:

1