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

Input: Consider Input: Sentence: 'a group of many horses going about in a grassy meadow'. How many words contain the letter 'f' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'several ties hang from a bar in a closet'. How many words contain the letter 'e' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a hot dog on a plate with chips'. How many words contain the letter 'n' in the sentence.


Output: 1