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

Example Input: Sentence: 'a bed has an empty bag and folded laundry stacked on it'. How many words contain the letter 'm' in the sentence.
Example Output: 1

Example Input: Sentence: 'the noodle salad has many spices in it'. How many words contain the letter 'v' in the sentence.
Example Output: 0

Example Input: Sentence: 'a man wearing a helmet is sitting on his blue motorcycle'. How many words contain the letter 'u' in the sentence.
Example Output:
1