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 clock tower under a grey cloudy sky'. How many words contain the letter 'l' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'an asian man ad woman on their cell phones'. How many words contain the letter 'i' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a meat sandwich is resting beside a mound of spinach and red lettuce leaves'. How many words contain the letter 'n' in the sentence.


Output: 5