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

Ex Input:
Sentence: 'two children practicing for a ski race without poles'. How many words contain the letter 'e' in the sentence.

Ex Output:
3


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: 'there is a female surfer that is riding a small wave'. How many words contain the letter 'f' in the sentence.

Ex Output:

2