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

Ex Input:
Sentence: 'a red and a white train cab on a rusty train track'. Count the occurrences of the word 'rusty' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a man that is cutting a pizza that is on a stove'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a bath room with a toilet a sink and a bath tub'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

4