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

Ex Input:
Sentence: 'a young man standing in front of a laptop computer'. How many words contain the letter 'y' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a man driving with his dog in the back seat'. How many words contain the letter 't' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a street with what looks like construction in the background'. How many words contain the letter 'a' in the sentence.

Ex Output:

3