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

Ex Input:
Sentence: 'a water fountain sitting in the middle of a bathroom'. How many words contain the letter 'h' in the sentence.

Ex Output:
2

Ex Input:
Sentence: 'two men playing a video game inside of a room'. How many words contain the letter 'f' in the sentence.

Ex Output:
1

Ex Input:
Sentence: 'a blue airplane is flying above the white clouds'. How many words contain the letter 'o' in the sentence.

Ex Output:
2