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

Example Input: Sentence: 'the view of a pier throw rain covered window'. How many words contain the letter 'p' in the sentence.
Example Output: 1

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 man walking on the beach with a red surfboard'. How many words contain the letter 'a' in the sentence.
Example Output:
6