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

Input: Consider Input: Sentence: 'a person in the air with a skateboard upside down underneath'. How many words contain the letter 'i' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a man sits beside large bags of fruit in a market'. How many words contain the letter 't' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a long train is coming down some tracks'. How many words contain the letter 'w' in the sentence.


Output: 1