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

Ex Input:
Sentence: 'well made salad on a white plate and a wine glass besides'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a pink unicorn painted on a newspaper box across the street from a bus in front of a theater'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
4


Ex Input:
Sentence: 'couple of people sitting out in the snow with skis beside them'. Count the occurrences of the word 'them' in the given sentence.

Ex Output:

1