OCC '19 B1 - Darcy_Liu
Darcy_Liu is the real Darcy Liu. However, there are many fake Darcys.
The real Darcy has one underscore in his username. Fake Darcys start with
darcy, contain a positive number of underscores, and end with
liu. Uppercase and lowercase do not matter, and usernames only contain alphanumeric characters and underscores.
Given a Dmoj username, print whether it is
One string, ~S~.
~1 \leq |S| \leq 100~
Sample Input 1
Sample Output 1
Sample Input 2
Sample Output 2
Sample Input 3
Sample Output 3