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

Ex Input:
Sentence: 'a view from a plane window near a large snowy peak'. How many words contain the letter 'u' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a bottle of beer and a red plate of food'. How many words contain the letter 'u' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a couple of people outside taking photos of a woman'. How many words contain the letter 'n' in the sentence.

Ex Output:

2