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

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

Ex Output:
3


Ex Input:
Sentence: 'a man walking across a beach carrying a surfboard'. How many words contain the letter 'i' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a kitchen with a stove microwave and cabinets'. How many words contain the letter 'q' in the sentence.

Ex Output:

0