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

Ex Input:
Sentence: 'a red plate and a person is decorating a cake'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a propeller plane that is parked in a hanger'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a hotdog with chili is sitting in a styrofoam container next to a serving of mustard'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3