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

Ex Input:
Sentence: 'he wants everyone to know that he has serious intentions for the tennis game'. How many words contain the letter 'h' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a young girl is brushing her teeth  in a bathroom'. How many words contain the letter 'f' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a person who is wearing snow skis and going down a hill'. How many words contain the letter 'f' in the sentence.

Ex Output:

0