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

Ex Input:
Sentence: 'a group of women sitting at a table near a window'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a sign pointing towards a mcdonalds is posted on a traffic light pole'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'apples onions grapes and a squash are on a table top'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2