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

Ex Input:
Sentence: 'a boat carries a smaller motorboat that is hitched on the back'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a group of men in front of a table of green bananas while a man in the blue plaid shirt holds his hand out as if to hold on to something'. Count the occurrences of the word 'in' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a plate with a piece of cake and a pat of butter with a fork'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

4