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

Example Input: Sentence: 'two children practicing for a ski race without poles'. How many words contain the letter 'e' in the sentence.
Example Output: 3

Example Input: Sentence: 'black and white photo of old man riding a motorcycle'. How many words contain the letter 'n' in the sentence.
Example Output: 3

Example Input: Sentence: 'this is an old style refrigerator white with wood grain handles'. How many words contain the letter 'i' in the sentence.
Example Output:
6