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

Ex Input:
Sentence: 'a pair of tennis players on a tennis court'. How many words contain the letter 'u' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a little boy that is sitting near two birds'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a gray and black striped cat standing up against the window'. How many words contain the letter 'j' in the sentence.

Ex Output:

0