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

Ex Input:
Sentence: 'a person in a helmet riding a skateboard'. How many words contain the letter 'c' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a man sits on a bench with a dog in lap reading'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a little boy eating a chocolate doughnut with sprinkles'. How many words contain the letter 'e' in the sentence.

Ex Output:

4