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

Input: Consider Input: Sentence: 'a mother and son holding wii controls in front of a christmas fireplace'. How many words contain the letter 'x' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'an acoustic guitar is shown laying on a bed'. How many words contain the letter 'l' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a woman with a cold drink is staring at a laptop'. How many words contain the letter 'd' in the sentence.


Output: 2