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

Input: Consider Input: Sentence: 'a pile of stuffed brown teddy bears wearing clothing'. How many words contain the letter 'w' in the sentence.

Output: 2

Input: Consider Input: Sentence: 'four white and blue street signs on a wooden pole'. How many words contain the letter 'u' in the sentence.

Output: 2

Input: Consider Input: Sentence: 'a small kitchen with black counters and a wide window'. How many words contain the letter 'a' in the sentence.
Output: 5