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 woman is smiling next to a dog'. How many words contain the letter 'j' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'a laptop and a computer on a desk'. How many words contain the letter 'x' in the sentence.

Ex Output:
0