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

Input: Consider Input: Sentence: 'a room with a small light in the middle with a computer'. How many words contain the letter 's' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'four white and blue street signs on a wooden pole'. How many words contain the letter 'u' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a crowd of people on a beach by the ocean'. How many words contain the letter 'x' in the sentence.


Output: 0