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

Ex Input:
Sentence: 'a female in a blue shirt a cat and a plate'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
4


Ex Input:
Sentence: 'a giant clock mounted on a building'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a group of guys playing a game of frisbee'. Count the occurrences of the word 'of' in the given sentence.

Ex Output:

2