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

Ex Input:
Sentence: 'dental personnel in dentist office standing in front of a computer screen'. How many words contain the letter 'w' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a man herding brown colored animals with a dog'. How many words contain the letter 'z' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a pile of banana sitting next to a stack of books'. How many words contain the letter 'i' in the sentence.

Ex Output:

2