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

Ex Input:
Sentence: 'a group of people pose together holding their skis in their hands'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a toddler and baby on a wooden floor scatter with papers'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
2


Ex Input:
Sentence: 'a man is playing video games on a television'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

2