SP21853 RIVALS - Rivals
Description
Mohamed Yasser (AKA Abo-3obaida) and Mohamed Ahmed (AKA Nesr) pretend to be rivals, the two clearly have a deep and understanding friendship.
Input Format
N/A
Output Format
For each test case, print a single integer the answer to the problem modulo 1000000007 (10 $ ^{9} $ + 7).