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

Ex Input:
Sentence: 'a computer desk holding a laptop computer and white ceramic lamp'. How many words contain the letter 'r' in the sentence.

Ex Output:
3

Ex Input:
Sentence: 'a fire hydrant on the side of the road near a building'. How many words contain the letter 'a' in the sentence.

Ex Output:
5

Ex Input:
Sentence: 'many shelves full of luggage in a department store'. How many words contain the letter 'z' in the sentence.

Ex Output:
0