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

Ex Input:
Sentence: 'a group of people standing outside in a park eating food on paper plates'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a crowd of people standing next to a bus'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a group of people sitting around a table with wine glasses and plates'. Count the occurrences of the word 'group' in the given sentence.

Ex Output:

1