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

Input: Consider Input: Sentence: 'a man with a hat on sitting in a car with the door open and a laptop on his lap'. How many words contain the letter 'e' in the sentence.

Output: 2

Input: Consider Input: Sentence: 'a road cut off by police barricade tape'. How many words contain the letter 'x' in the sentence.

Output: 0

Input: Consider Input: Sentence: 'a woman leaning down on a bench tying her shoe'. How many words contain the letter 'r' in the sentence.
Output: 1