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

Example Input: Sentence: 'a white biplane on grassy area next to buildings'. How many words contain the letter 'g' in the sentence.
Example Output: 2

Example Input: Sentence: 'a large brown dog with a white deflated ball in its mouth'. How many words contain the letter 'm' in the sentence.
Example Output: 1

Example Input: Sentence: 'a man poses leaning against a refrigerator with an empty box in front of him'. How many words contain the letter 'j' in the sentence.
Example Output:
0