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

Input: Consider Input: Sentence: 'a man that is sitting at a table with a bowl'. How many words contain the letter 'k' in the sentence.

Output: 0

Input: Consider Input: Sentence: 'some soldiers cutting into a big sheet cake on a table'. How many words contain the letter 'c' in the sentence.

Output: 2

Input: Consider Input: Sentence: 'a long legged long beaked birth walking on the edge of the ocean'. How many words contain the letter 'r' in the sentence.
Output: 1