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

Ex Input:
Sentence: 'a motorcycle parked in front of a small cafe'. How many words contain the letter 'n' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'person standing in the grass striking a baseball with a bat'. How many words contain the letter 's' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a baseball batter at the end of the swing'. How many words contain the letter 'l' in the sentence.

Ex Output:

1