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

Ex Input:
Sentence: 'a young boy holds a baseball bat while a man stands next to him'. How many words contain the letter 'p' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a large airplane flying over a dry grass hillside'. How many words contain the letter 'e' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a child hitting a baseball with a baseball bat'. How many words contain the letter 'o' in the sentence.

Ex Output:

0