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

Ex Input:
Sentence: 'a large jetliner with a space shuttle on its back next to a fighter jet'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'cows crowd up to a barbed wire fence under a tree'. How many words contain the letter 'n' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a person in a raincoat walks an elephant through a park'. How many words contain the letter 'h' in the sentence.

Ex Output:

2