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

Input: Consider Input: Sentence: 'this bus waits at a bus station for passengers to board'. How many words contain the letter 'e' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a stuffed animal yellow giraffe placed next to a sandwich as if the giraffe is eating it with a large body of water and grass areas in the background'. How many words contain the letter 'g' in the sentence.

Output: 6


Input: Consider Input: Sentence: 'a man on a bike crossing a street with cars approaching'. How many words contain the letter 'f' in the sentence.


Output: 0