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

Ex Input:
Sentence: 'a biscuit that someone has taken a bite out of'. How many words contain the letter 'k' in the sentence.

Ex Output:
1

Ex Input:
Sentence: 'a man is holding a bunch of green bananas in his yard'. How many words contain the letter 'i' in the sentence.

Ex Output:
4

Ex Input:
Sentence: 'man in standing near a tree holding two umbrellas'. How many words contain the letter 'p' in the sentence.

Ex Output:
0