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

Input: Consider Input: Sentence: 'the zebra is showing his rear end to the camera'. How many words contain the letter 'r' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'someone is holding an orange and black iphone'. How many words contain the letter 'h' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a man walking into the ocean holding a surfboard'. How many words contain the letter 'm' in the sentence.


Output: 1