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

Example Input: Sentence: 'three children standing behind a little girl with a bat in her hands'. How many words contain the letter 'c' in the sentence.
Example Output: 1

Example Input: Sentence: 'a name and clock lit up at night'. How many words contain the letter 'y' in the sentence.
Example Output: 0

Example Input: Sentence: 'a blue double decked bus passing by some trees'. How many words contain the letter 'k' in the sentence.
Example Output:
1