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

Input: Consider Input: Sentence: 'a plate has many different types of food on it'. How many words contain the letter 'r' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a large brown dog with a white deflated ball in its mouth'. How many words contain the letter 'm' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a man is hopping with a tennis racquet in the middle of the afternoon as people watch'. How many words contain the letter 'n' in the sentence.


Output: 5