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

Input: Consider Input: Sentence: 'the young giraffe is standing near the fence'. How many words contain the letter 's' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a person is riding a bicycle on the street'. How many words contain the letter 'b' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'the commuter is waiting patiently in the line'. How many words contain the letter 'e' in the sentence.


Output: 5