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

Input: Consider Input: Sentence: 'a large airplane flying over a dry grass hillside'. How many words contain the letter 'e' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a mother and son holding wii controls in front of a christmas fireplace'. How many words contain the letter 'x' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a picture of a bathroom inside a persons house'. How many words contain the letter 'x' in the sentence.


Output: 0