In this task, you need to count the number of words in a sentence that contain the given letter

Input: Consider Input: Sentence: 'a little girl sitting on the floor reading a book'. How many words contain the letter 'n' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a man with a surfboard walking across a bridge towards the ocean'. How many words contain the letter 'w' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a herd of cattle grazing on a lush green field'. How many words contain the letter 'y' in the sentence.


Output: 0