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

Input: Consider Input: Sentence: 'a car stopped at a red light at an intersection'. How many words contain the letter 'l' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a green and white street sign on a pole and a light'. How many words contain the letter 's' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a man in a blue shirt and ear piece holds a clip board'. How many words contain the letter 'u' in the sentence.


Output: 1