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 feet wearing slippers pointed at the floor'. How many words contain the letter 'e' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a young man dressed like a pirate on a skateboard'. How many words contain the letter 'a' in the sentence.

Ex Output:
6


Ex Input:
Sentence: 'the yellow truck is riding behind the grey city bus'. How many words contain the letter 'j' in the sentence.

Ex Output:

0