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

Input: Consider Input: Sentence: 'a woman with long red hair packing herself into a suitcase'. How many words contain the letter 'i' in the sentence.

Output: 5


Input: Consider Input: Sentence: 'a woman riding a motorcycle down a busy city street'. How many words contain the letter 'w' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a person riding a skate board on a ledge'. How many words contain the letter 'u' in the sentence.


Output: 0