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

Input: Consider Input: Sentence: 'a clock in the middle of a building'. How many words contain the letter 'x' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a glass vase with clear glass marbles in it and purple flowers coming out of the vase'. How many words contain the letter 'd' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a doubledecker bus on a slightly busy street'. How many words contain the letter 'r' in the sentence.


Output: 2