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

Ex Input:
Sentence: 'lots of colorful watercraft parked at a large body of water'. Count the occurrences of the word 'of' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'close up of a dog walking on a beach near a body of water'. Count the occurrences of the word 'of' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a bird with a long beak swimming on the surface of a body of water'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3