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

Input: Consider Input: Sentence: 'zebra eating from the ground near a tree'. How many words contain the letter 'k' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'there are some warning signs on a public toilet'. How many words contain the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a single elephant that is looking on the ground for food'. How many words contain the letter 'i' in the sentence.


Output: 3