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

Ex Input:
Sentence: 'cows crowd up to a barbed wire fence under a tree'. How many words contain the letter 'n' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'the view of a pier throw rain covered window'. How many words contain the letter 'p' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a young woman sitting in front of four laptop computers'. How many words contain the letter 'p' in the sentence.

Ex Output:

2