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

Input: Consider Input: Sentence: 'a little girl holds a tooth brush while her mother stands in the background in a bathroom'. Count the occurrences of the word 'while' in the given sentence.

Output: 1


Input: Consider Input: Sentence: 'well made salad on a white plate and a wine glass besides'. Count the occurrences of the word 'a' in the given sentence.

Output: 2


Input: Consider Input: Sentence: 'a group of snow boarders pose in the snow on top of a hill'. Count the occurrences of the word 'snow' in the given sentence.


Output: 2