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

Input: Consider Input: Sentence: 'the train needs to be serviced so it is o the truck'. How many words contain the letter 'n' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a beautiful woman playing with a small green bird'. How many words contain the letter 't' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a small bird standing on a handle bar'. How many words contain the letter 'k' in the sentence.


Output: 0