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

Ex Input:
Sentence: 'a hotel room with a nice tv and sofa setup'. How many words contain the letter 'i' in the sentence.

Ex Output:
2


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 close up of an open luggage bag'. How many words contain the letter 'o' in the sentence.

Ex Output:

3