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

Input: Consider Input: Sentence: 'the bathroom has a shower toilet toilet paper and a sink with leaves in it'. How many words contain the letter 'v' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'people standing in a river surrounding an elephant some are touching it'. How many words contain the letter 'd' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a futon type bed is in a room with a wooden floor'. How many words contain the letter 'b' in the sentence.


Output: 1