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

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 child on the sand and a boat and some water'. How many words contain the letter 's' in the sentence.
Example Output: 2

Example Input: Sentence: 'the outside of a building with snow on the sidewalk'. How many words contain the letter 'h' in the sentence.
Example Output:
3