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

Ex Input:
Sentence: 'a man that is sitting on a horse in the grass'. How many words contain the letter 'y' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'the jet is flying through the sky during the day'. How many words contain the letter 'i' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a group of motorcycles on the side of a street'. How many words contain the letter 'k' in the sentence.

Ex Output:

0