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

Ex Input:
Sentence: 'this bus waits at a bus station for passengers to board'. How many words contain the letter 'e' in the sentence.

Ex Output:
1

Ex Input:
Sentence: 'a tv showing a broadcast from the weather channel'. How many words contain the letter 'j' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'a carrot and celery are on a cutting board'. How many words contain the letter 's' in the sentence.

Ex Output:
0