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

Input: Consider Input: Sentence: 'a street scene with cars and an city bus'. How many words contain the letter 's' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'the beach has six open umbrellas on poles'. How many words contain the letter 'g' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a bird perched on top of a tree branch'. How many words contain the letter 'o' in the sentence.


Output: 3