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

Example Input: Sentence: 'black and white photo of old man riding a motorcycle'. How many words contain the letter 'n' in the sentence.
Example Output: 3

Example Input: Sentence: 'two giraffe a mom and baby both with their heads up'. How many words contain the letter 'w' in the sentence.
Example Output: 2

Example Input: Sentence: 'a bol of fruit and ice cream sit on a plate with a bagel'. How many words contain the letter 'k' in the sentence.
Example Output:
0