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

Example Input: Sentence: 'a ram standing still in an empty pasture'. How many words contain the letter 'x' in the sentence.
Example Output: 0

Example Input: Sentence: 'several people and a dog riding on a small boat'. How many words contain the letter 'l' in the sentence.
Example Output: 3

Example Input: Sentence: 'two images show a tennis player in a purple shirt'. How many words contain the letter 'g' in the sentence.
Example Output:
1