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

Ex Input:
Sentence: 'a red and green fire hydrant in son a sidewalk'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a hotdog is in a bun covered in cheese'. How many words contain the letter 'q' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a bunch of random stuff sitting together on a tablecloth'. How many words contain the letter 'u' in the sentence.

Ex Output:

2