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

Ex Input:
Sentence: 'a lamb front diagonal view laying in a shady area of sunny grass with front half of a sheep looking at camera on right side of photo'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'two men and two women skiing across country'. Count the occurrences of the word 'two' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'two horses grazing in a fenced in grassy field'. Count the occurrences of the word 'in' in the given sentence.

Ex Output:

2