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

Example Input: Sentence: 'the zebra is showing his rear end to the camera'. How many words contain the letter 'r' in the sentence.
Example Output: 3

Example Input: Sentence: 'a college student throws a frisbee in a field'. How many words contain the letter 't' in the sentence.
Example Output: 2

Example Input: Sentence: 'a bed wall hanging table and chair in a room'. How many words contain the letter 'l' in the sentence.
Example Output:
2