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: 'he wants everyone to know that he has serious intentions for the tennis game'. How many words contain the letter 'h' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a slider and mashed potatoes lie on a flower plate'. How many words contain the letter 'b' in the sentence.

Ex Output:

0