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

Ex Input:
Sentence: 'a teddy bear is strapped into a seat'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'baseball players on the field in the middle of a game'. Count the occurrences of the word 'the' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a plate with half sandwiches stacked on it sitting on a table in a restaurant'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3