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

Ex Input:
Sentence: 'the tennis player returns a serve of the tennis ball'. How many words contain the letter 'q' in the sentence.

Ex Output:
0


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 red bike is emerged in green bushes'. How many words contain the letter 'u' in the sentence.

Ex Output:

1