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

Example Input: Sentence: 'a view from inside a train cart going down a track'. How many words contain the letter 'e' in the sentence.
Example Output: 2

Example Input: Sentence: 'a man flying through the air while riding a snowboard'. How many words contain the letter 'x' in the sentence.
Example Output: 0

Example Input: Sentence: 'a seagull standing with wings extended on block wall near the water'. How many words contain the letter 'u' in the sentence.
Example Output:
1