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

Ex Input:
Sentence: 'a plate of salad on a table containing tuna spinach and carrot'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a group of people stand inside of a big room'. Count the occurrences of the word 'inside' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a zebra in the wild walking towards a dirt road'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2