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

Input: Consider Input: Sentence: 'a man walking across a beach carrying a surfboard'. How many words contain the letter 'i' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'two males and a drink a laptop and a cellphone'. How many words contain the letter 'b' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'an older asian couple dressed in red and blue play wii in a living area'. How many words contain the letter 'f' in the sentence.


Output: 0