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

Ex Input:
Sentence: 'antique fire truck restored and displayed at outdoor event'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a small plain kitchen with a white stove and microwave'. How many words contain the letter 'h' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'teen boys skating in a rink and spray painting the walls'. How many words contain the letter 'k' in the sentence.

Ex Output:

2