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

Ex Input:
Sentence: 'a living room with couches chairs and tables'. How many words contain the letter 'a' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'sitting room with couch and entertainment system in cabinets'. How many words contain the letter 'e' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a glass of wine sitting inside of a microwave'. How many words contain the letter 'a' in the sentence.

Ex Output:

4