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

Ex Input:
Sentence: 'a bottle of beer and a red plate of food'. How many words contain the letter 'u' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'a stop light that is out on a pole'. How many words contain the letter 'z' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'a desktop computer is sitting on the computer desk'. How many words contain the letter 'o' in the sentence.

Ex Output:
4