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

Ex Input:
Sentence: 'a cat lying on an open laptop that is on a bed'. How many words contain the letter 'y' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a glass vase with clear glass marbles in it and purple flowers coming out of the vase'. How many words contain the letter 'd' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a man taking a picture of a mirror in a bathroom'. How many words contain the letter 'l' in the sentence.

Ex Output:

0