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

Input: Consider Input: Sentence: 'a tennis player holds a ball as if to throw it in the air to serve it'. How many words contain the letter 'o' in the sentence.

Output: 4

Input: Consider Input: Sentence: 'a counter top that has many pots and ingredients on it'. How many words contain the letter 'b' in the sentence.

Output: 0

Input: Consider Input: Sentence: 'there women sitting on a couch playing a game with nintendo wii controllers'. How many words contain the letter 'i' in the sentence.
Output: 5