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

Ex Input:
Sentence: 'a group of many horses going about in a grassy meadow'. How many words contain the letter 'f' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'an image of a man with a tennis racket in hand'. How many words contain the letter 'u' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a broiled chicken sits atop a vegetable platter'. How many words contain the letter 'u' in the sentence.

Ex Output:

0