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

Ex Input:
Sentence: 'a woman swinging a tennis racquet in the air'. How many words contain the letter 'z' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'people holding a surfboard and walking down the beach'. How many words contain the letter 'n' in the sentence.

Ex Output:
4

Ex Input:
Sentence: 'six lane highway with moderate traffic running through a city'. How many words contain the letter 'j' in the sentence.

Ex Output:
0