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

Input: Consider Input: Sentence: 'a living room with couches chairs and tables'. How many words contain the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'three zebras are shown in a black and white photo'. How many words contain the letter 'y' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a clock tower with ornate clock at the bottom'. How many words contain the letter 'l' in the sentence.


Output: 2