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: 'a child on the sand and a boat and some water'. How many words contain the letter 's' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a parking meter with 23 minutes remaining on the meter'. How many words contain the letter 'o' in the sentence.


Output: 1