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

Ex Input:
Sentence: 'an airplane in the sky trailing condensation'. How many words contain the letter 'p' in the sentence.

Ex Output:
1

Ex Input:
Sentence: 'a pizza sitting on top of a black cutting board'. How many words contain the letter 'g' in the sentence.

Ex Output:
2

Ex Input:
Sentence: 'a large long train on a steel track'. How many words contain the letter 'u' in the sentence.

Ex Output:
0