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

Example Input: Sentence: 'a horse and a donkey stand in a fenced field'. How many words contain the letter 'd' in the sentence.
Example Output: 5

Example Input: Sentence: 'a black and white photo of a plane sitting on a runway'. How many words contain the letter 'b' in the sentence.
Example Output: 1

Example Input: Sentence: 'a person riding a bike next to a bus'. How many words contain the letter 'm' in the sentence.
Example Output:
0