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

Example Input: Sentence: 'many people are playing a sports video game while standing up'. How many words contain the letter 'l' in the sentence.
Example Output: 3

Example Input: Sentence: 'a motorcycle parked in front of a small cafe'. How many words contain the letter 'n' in the sentence.
Example Output: 2

Example Input: Sentence: 'a woman that is standing next to a motorcycle'. How many words contain the letter 'x' in the sentence.
Example Output:
1