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

Input: Consider Input: Sentence: 'a skier skiing on the mountain with trees behind him'. How many words contain the letter 'z' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a little baby boy wearing an vest and tie'. How many words contain the letter 'e' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a man riding a dirt bike while flying through the air'. How many words contain the letter 'x' in the sentence.


Output: 0