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

Ex Input:
Sentence: 'the tennis player returns a serve of the tennis ball'. How many words contain the letter 'q' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a man showing a piece of hardware he took apart'. How many words contain the letter 'y' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a beach if crowded with many people their beach towels and umbrellas'. How many words contain the letter 'b' in the sentence.

Ex Output:

3