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

Input: Consider Input: Sentence: 'several people sitting around a table eating pizza'. How many words contain the letter 'u' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a large herd of farm animals are with a cowboy'. How many words contain the letter 'l' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a man standing at a urinal in a public bathroom'. How many words contain the letter 's' in the sentence.


Output: 1