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

Example Input: Sentence: 'this is a yellow train riding the rails'. How many words contain the letter 'n' in the sentence.
Example Output: 2

Example Input: Sentence: 'a kitchen in a camp with gear and coats laid out'. How many words contain the letter 'i' in the sentence.
Example Output: 4

Example Input: Sentence: 'one lady and two men dressed in black and white'. How many words contain the letter 'h' in the sentence.
Example Output:
1