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

Ex Input:
Sentence: 'bus parked next to a side walk on the road'. How many words contain the letter 'd' 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: 'an airplane on wet pavement surrounded by snow'. How many words contain the letter 'c' in the sentence.

Ex Output:
0