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

Example Input: Sentence: 'some soldiers cutting into a big sheet cake on a table'. How many words contain the letter 'c' in the sentence.
Example Output: 2

Example Input: Sentence: 'a microwaved broccoli and cheese dish and a spoon'. How many words contain the letter 'n' in the sentence.
Example Output: 3

Example Input: Sentence: 'the young man is talking on a cell phone'. How many words contain the letter 's' in the sentence.
Example Output:
1