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

Example Input: Sentence: 'a man is water skiing in the ocean'. How many words contain the letter 'c' in the sentence.
Example Output: 1

Example Input: Sentence: 'two women in an arena with a cow'. How many words contain the letter 'u' in the sentence.
Example Output: 0

Example Input: Sentence: 'a yellow train pulling into a station'. How many words contain the letter 'o' in the sentence.
Example Output:
3