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

Example Input: Sentence: 'green bananas or plantains hang in a bunch on a tree'. How many words contain the letter 'm' in the sentence.
Example Output: 0

Example Input: Sentence: 'a mother and son holding wii controls in front of a christmas fireplace'. How many words contain the letter 'x' in the sentence.
Example Output: 0

Example Input: Sentence: 'a young boy sitting on a skate board in the air on a pole'. How many words contain the letter 'x' in the sentence.
Example Output:
0

