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

Ex Input:
Sentence: 'martha stewart holding a fluffy siamese cat on her arms'. How many words contain the letter 'a' in the sentence.

Ex Output:
6


Ex Input:
Sentence: 'a man in a suit with his finger in his ear'. How many words contain the letter 'm' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a begrimed man smiles while holding three bananas'. How many words contain the letter 'e' in the sentence.

Ex Output:

4