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

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

Output: 3

Input: Consider Input: Sentence: 'a teenager and child are fighting for a frisbee'. How many words contain the letter 'm' in the sentence.

Output: 0

Input: Consider Input: Sentence: 'some people outside on a nice day at a skate park'. How many words contain the letter 'd' in the sentence.
Output: 2