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

Input: Consider Input: Sentence: 'there are some warning signs on a public toilet'. How many words contain the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a man that is sitting on a horse in the grass'. How many words contain the letter 'y' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'the flowers are being displayed in the dark room'. How many words contain the letter 'h' in the sentence.


Output: 2