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

Example Input: Sentence: 'child standing in front of a stop sign on a suburban street corner'. How many words contain the letter 'u' in the sentence.
Example Output: 1

Example Input: Sentence: 'a group of men sitting by tables working on laptops'. How many words contain the letter 'l' in the sentence.
Example Output: 2

Example Input: Sentence: 'sliced sandwich with potatoes chips lettuce and tomato on plate'. How many words contain the letter 'm' in the sentence.
Example Output:
1