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

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: 'a toilet and long handled plunger in a cleaned bathroom'. How many words contain the letter 'i' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a man watching a plane in the ocean'. How many words contain the letter 'f' in the sentence.

Ex Output:

0