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: 'two men are dancing in a parade with brown umbrellas'. How many words contain the letter 'r' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'train coming down track at fast speed against blue sky'. How many words contain the letter 'p' in the sentence.


Output: 1