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: 'a man buttering toast in his kitchen on the counter'. How many words contain the letter 'c' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'an enclosure with water and snow inside of it'. How many words contain the letter 'x' in the sentence.

Ex Output:

0