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

Input: Consider Input: Sentence: 'people walking down the sidewalk with no turn signs'. How many words contain the letter 'e' in the sentence.

Output: 3

Input: Consider Input: Sentence: 'a living room with couches chairs and tables'. How many words contain the letter 'a' in the sentence.

Output: 4

Input: Consider Input: Sentence: 'a train track near a grassy area during the day'. How many words contain the letter 'm' in the sentence.
Output: 0