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

Input: Consider Input: Sentence: 'a kitchen in a camp with gear and coats laid out'. How many words contain the letter 'i' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a woman surfer is on an ocean wave'. How many words contain the letter 's' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a man on a surf board riding the waves'. How many words contain the letter 'w' in the sentence.


Output: 1