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

Ex Input:
Sentence: 'a mother zebra standing next to a baby zebra'. How many words contain the letter 'e' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a large red sign on a metal pole'. How many words contain the letter 'q' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a baseball player swinging his bat at an incoming pitch'. How many words contain the letter 'd' in the sentence.

Ex Output:

0