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

Example Input: Sentence: 'someone is holding an orange and black iphone'. How many words contain the letter 'h' in the sentence.
Example Output: 2

Example Input: Sentence: 'adults with helmets sitting on tricycles made for children'. How many words contain the letter 'r' in the sentence.
Example Output: 3

Example Input: Sentence: 'a person is surfing on the waves in the ocean'. How many words contain the letter 'w' in the sentence.
Example Output:
1