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

Example Input: Sentence: 'some stop lights that are at an intersection'. How many words contain the letter 'c' in the sentence.
Example Output: 1

Example Input: Sentence: 'a green blue and yellow boat sitting in a harbor'. How many words contain the letter 'o' in the sentence.
Example Output: 3

Example Input: Sentence: 'man with containers of paint painting the design on plates'. How many words contain the letter 'u' in the sentence.
Example Output:
0