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

Input: Consider Input: Sentence: 'people holding a surfboard and walking down the beach'. How many words contain the letter 'n' in the sentence.

Output: 4


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 very cute rat by a laptop and some coffee'. How many words contain the letter 'c' in the sentence.


Output: 2