Alexa Validator
Input: "Alexa, turn on the music"
Rule: Starts with Alexa
Output: VALID
This problem asks you to validate whether a given input string starts with the prefix Alexa. In the sample, "Alexa, turn on the music" satisfies the rule, so the output is VALID. The key idea is a simple prefix check, typically using a startsWith-style comparison, while paying attention to exact characters such as case, spaces, and punctuation.
END
