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

Input: Consider Input: Sentence: 'three zebras are shown in a black and white photo'. How many words contain the letter 'y' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'the teddy bears are posed to sit at the toy picnic table'. How many words contain the letter 'v' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a person holds a hotdog towards three stuffed bears'. How many words contain the letter 'o' in the sentence.


Output: 4