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 people skiing down a mountain slope'. How many words contain the letter 'e' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'several men standing up in a large room holding wii controllers'. How many words contain the letter 'h' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a red train on a track near a covered area'. How many words contain the letter 'k' in the sentence.


Output: 1