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: 'a green and white street sign on a pole and a light'. How many words contain the letter 's' in the sentence.
Example Output: 2

Example Input: Sentence: 'a street scene with a woman crossing at the crosswalk'. How many words contain the letter 'l' in the sentence.
Example Output:
1