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

Input: Consider Input: Sentence: 'a child is lighting candles on a cake'. How many words contain the letter 't' in the sentence.

Output: 1

Input: Consider Input: Sentence: 'a young person flying through the air while riding a skateboard'. How many words contain the letter 'd' in the sentence.

Output: 2

Input: Consider Input: Sentence: 'a black down lounging on its pet bed'. How many words contain the letter 'y' in the sentence.
Output: 0