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

Ex Input:
Sentence: 'a sign that shows you are entering into joshua tree national park'. How many words contain the letter 't' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a man in a restaurant makes the v sign with both hands'. How many words contain the letter 'n' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a woman laying on a snowboard with her jacket open'. How many words contain the letter 'r' in the sentence.

Ex Output:

2