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

Ex Input:
Sentence: 'a white toilet sitting under a window next to a bath tub'. Count the occurrences of the word 'white' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a couple of elephants out in the field having a snack'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a man with a small dog sitting in front of him in a kitchen'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3