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

Example Input: Sentence: 'a man in mid swing of a baseball bat'. How many words contain the letter 'k' in the sentence.
Example Output: 0

Example Input: Sentence: 'a train that is pulling into the station'. How many words contain the letter 't' in the sentence.
Example Output: 5

Example Input: Sentence: 'a busy road with many cars that has an exit to the right'. How many words contain the letter 'o' in the sentence.
Example Output:
2