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

Example Input: Sentence: 'a commuter train near a platform with no one on it'. How many words contain the letter 'z' in the sentence.
Example Output: 0

Example Input: Sentence: 'some people at a table with food and drinks'. How many words contain the letter 'n' in the sentence.
Example Output: 2

Example Input: Sentence: 'an old bus parked in the woods'. How many words contain the letter 'n' in the sentence.
Example Output:
2