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

Ex Input:
Sentence: 'a man holding an owl in a lush green field'. How many words contain the letter 'y' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a jet airliner carrying a small shuttle above it'. How many words contain the letter 'r' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a cat and a dog next to each other'. How many words contain the letter 'u' in the sentence.

Ex Output:

0