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

Input: Consider Input: Sentence: 'a laptop is displayed on a small wooden platform'. How many words contain the letter 'k' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a man in a helmet leans on his motorcycle'. How many words contain the letter 'n' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'woman throwing umbrella into air on frozen lake'. How many words contain the letter 'z' in the sentence.


Output: 1