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

Input: Consider Input: Sentence: 'an elephant stands in the grass near a tree'. How many words contain the letter 'c' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'people walking down the sidewalk with no turn signs'. How many words contain the letter 'e' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'some animals run together in the tall grass'. How many words contain the letter 'u' in the sentence.


Output: 1