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

Input: Consider Input: Sentence: 'a group of people on a beach beneath a cloudy sky'. How many words contain the letter 'g' in the sentence.

Output: 1

Input: Consider Input: Sentence: 'a beautiful old clock tower in a citys historic district'. How many words contain the letter 'a' in the sentence.

Output: 3

Input: Consider Input: Sentence: 'a man flying through the air while riding a skateboard'. How many words contain the letter 'p' in the sentence.
Output: 0