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

Input: Consider Input: Sentence: 'a plate with a grilled sanwich next to a bowl of tomato soup'. How many words contain the letter 'a' in the sentence.

Output: 6


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 man is standing next to a zebra with another man riding the zebra'. How many words contain the letter 'n' in the sentence.


Output: 6