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 skiing down a mountain slope'. How many words contain the letter 'e' in the sentence.

Output: 2

Input: Consider Input: Sentence: 'guys in a living room playing a wii bowling game'. How many words contain the letter 'c' in the sentence.

Output: 0

Input: Consider Input: Sentence: 'a couple of rhinos standing in a field near a zebra'. How many words contain the letter 'o' in the sentence.
Output: 3