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

Ex Input:
Sentence: 'some people are sitting around a black table'. How many words contain the letter 'v' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a cat sitting on the arm of a chair'. How many words contain the letter 'g' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'man and a woman under an umbrella walking on a lawn'. How many words contain the letter 'c' in the sentence.

Ex Output:

0