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

Input: Consider Input: Sentence: 'adults with helmets sitting on tricycles made for children'. How many words contain the letter 'r' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'chopsticks and oriental food in white dishes sit on a wooden table'. How many words contain the letter 'z' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a maroon train traveling down a train track next to trees'. How many words contain the letter 'y' in the sentence.


Output: 0