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

Ex Input:
Sentence: 'a man with a surfboard walking across a bridge towards the ocean'. How many words contain the letter 'w' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'black and white photograph of a man using a cell phone on the street'. How many words contain the letter 'r' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a white cat looking in a rectangular mirror in a female bedroom'. How many words contain the letter 'q' in the sentence.

Ex Output:

0