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

Ex Input:
Sentence: 'a small bird on a tree branch with a fruit'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a picture of a vase with pink flowers in it'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a desk with a couple of monitors and keyboards on it'. Count the occurrences of the word 'monitors' in the given sentence.

Ex Output:

1