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 bench is in the ocean water with a fishing pole'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a man in black wetsuit windsurfing above a blue ocean'. How many words contain the letter 'n' in the sentence.

Ex Output:

4