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

Ex Input:
Sentence: 'a kitchen with a double sink and a window'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a group of fire trucks ride down the road'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a woman sleeps in a bed with a pillow and sheet'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3