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

Ex Input:
Sentence: 'a couple is fast asleep at 3 in the morning'. How many words contain the letter 'y' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'an individual poses for a picture beside a bright window'. How many words contain the letter 'y' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a horse stands in a field with a lighthouse in the background'. How many words contain the letter 'z' in the sentence.

Ex Output:

0