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

Input: Consider Input: Sentence: 'the two people are in wetsuits in the ocean while one rides a wave'. How many words contain the letter 'd' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'several people and a dog riding on a small boat'. How many words contain the letter 'l' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a photograph of a bathroom in a home'. How many words contain the letter 'k' in the sentence.


Output: 0