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

Example Input: Sentence: 'a sign that shows you are entering into joshua tree national park'. How many words contain the letter 't' in the sentence.
Example Output: 5

Example Input: Sentence: 'a man in a tie that is looking to the side'. How many words contain the letter 'm' in the sentence.
Example Output: 1

Example Input: Sentence: 'a giraffe stands on a path on the grass'. How many words contain the letter 'm' in the sentence.
Example Output:
0