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

Ex Input:
Sentence: 'a man in a boat in a large lake'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:
3


Ex Input:
Sentence: 'a man playing baseball slides into home near the catcher'. Count the occurrences of the word 'the' in the given sentence.

Ex Output:
1


Ex Input:
Sentence: 'a white sink and a toilet in a room'. Count the occurrences of the word 'a' in the given sentence.

Ex Output:

3