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

Ex Input:
Sentence: 'group of old women sitting at a restaurant dinner table together'. Count the occurrences of the word 'old' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a person is skate skiing and some plants and trees'. Count the occurrences of the word 'and' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a person taking a photo of a person brushing her teeth'. Count the occurrences of the word 'of' in the given sentence.

Ex Output:

1