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

Example Input: Sentence: 'adult men playing with flying disc at popular beach'. How many words contain the letter 'o' in the sentence.
Example Output: 1

Example Input: Sentence: 'a pair of zebras looking towards the camera in a barren field'. How many words contain the letter 'u' in the sentence.
Example Output: 0

Example Input: Sentence: 'the boys are playing a game of baseball on the field'. How many words contain the letter 'k' in the sentence.
Example Output:
0