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

Input: Consider Input: Sentence: 'five sheep out in an open field eating straw'. How many words contain the letter 'd' in the sentence.

Output: 1

Input: Consider Input: Sentence: 'a name and clock lit up at night'. How many words contain the letter 'y' in the sentence.

Output: 0

Input: Consider Input: Sentence: 'this is a group of five cats resting on a bed'. How many words contain the letter 'u' in the sentence.
Output: 1