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

Input: Consider Input: Sentence: 'there is a red tea pot that has flowers in it'. How many words contain the letter 'o' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a bunch of white hyacinths arranged in a vase'. How many words contain the letter 'r' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'people walk down a rainy avenue carrying umbrellas'. How many words contain the letter 'q' in the sentence.


Output: 0