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

Ex Input:
Sentence: 'sitting room with couch and entertainment system in cabinets'. How many words contain the letter 'e' in the sentence.

Ex Output:
3

Ex Input:
Sentence: 'a little girl sitting on the floor reading a book'. How many words contain the letter 'n' in the sentence.

Ex Output:
3

Ex Input:
Sentence: 'a girls soccer game is in the works onthe field'. How many words contain the letter 'x' in the sentence.

Ex Output:
0