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

Ex Input:
Sentence: 'two hotdogs on with various toppings and a drink on a counter'. How many words contain the letter 'w' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a young man attempting to fly a kite on a forest hillside'. How many words contain the letter 'f' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'an old pickup truck is parked in front of a parking meter'. How many words contain the letter 'c' in the sentence.

Ex Output:

2