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

Example Input: Sentence: 'the train needs to be serviced so it is o the truck'. How many words contain the letter 'n' in the sentence.
Example Output: 2

Example Input: Sentence: 'five kids playing with frisbees on a sunny day'. How many words contain the letter 'p' in the sentence.
Example Output: 1

Example Input: Sentence: 'a young man in a black tee holding a racquet'. How many words contain the letter 'e' in the sentence.
Example Output:
2