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

Input: Consider Input: Sentence: 'a fire hydrant on the side of the road near a building'. How many words contain the letter 'a' in the sentence.

Output: 5


Input: Consider Input: Sentence: 'a young skateboarder is performing tricks in a driveway'. How many words contain the letter 'd' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'hanging plane near building with people at amusement part'. How many words contain the letter 'u' in the sentence.


Output: 2