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

Ex Input:
Sentence: 'a rack full of clothes in a small bedroom'. How many words contain the letter 'o' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a business man is talking on the phone'. How many words contain the letter 'e' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a man a woman playing some kind of game using a broken toilet and toilet plungers'. How many words contain the letter 'r' in the sentence.

Ex Output:

2