Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

Input: Consider Input: Romania and which other country joined the EU on the 1st January 2007?

Output: bulgaria


Input: Consider Input: What is the second letter of the Greek alphabet?

Output: beta


Input: Consider Input: Which band released the albums Houses of Holy and Physical Graffiti?


Output: led zeppelin