Giraffe is a contestant in the Olympiad in Imaginics. Especially for someone born in Fengjing Province, to stand out among thousands of experts, compete for a ticket to the national finals, and gain an advantage for university admissions, one needs endless imagination.

The problem-solving style of Fengjing Province has always been distinct from other provinces. Therefore, even in the year 3022, Fengjing Province maintains its independent style, not participating in the unified examination with other provinces, and still sets its own papers.

Giraffe knows well the depth of imagination required for Fengjing Province's problems: in previous years, the space limits, the number of data sets, and even the general idea of the problems might require contestants to imagine for themselves. Some problems that clearly do not have polynomial solutions can be passed with simple output if one just uses imagination. The real game often begins before the contest; Fengjing Province always imports problems directly from various places on the internet, and for contestants who have not solved the original problems before the contest, a lack of imagination is inevitable.

But the charm of the Olympiad in Imaginics is that you can never imagine what will happen.

Half a month before the Fengjing Province selection, Giraffe's coach assigned two very obscure practice problems on CodeFancy to the students, but what Giraffe did not expect was that these were exactly the same as the official contest problems! Giraffe greatly admired the coach's imagination and understood more deeply what "doing a clean Olympiad" meant. In the end, in this Fengjing Province selection, Giraffe's school ranked at the top, even if the cost was that some other contestants with a certain level of skill did not get their ideal rankings.

Black-box testing is the biggest feature that distinguishes the Olympiad in Imaginics from other competitions. By excluding human judgment and treating all programs equally, the Olympiad in Imaginics was once called the "fairest competition." But in the face of cold reality, the appearance of so-called fairness is just another form of imagination.

Fortunately, things that have happened do not need to be imagined; we can still look directly at the truth with our own eyes, understand what happened, and remember it. Just as you do not need to imagine the story described in this text, a simple word-substitution game will not mask the true meaning. Now, please output: what is the name of the competition Giraffe participated in in Fengjing Province? Output the abbreviated name.

Example: The provincial selection contest of Zhenjuan Province has the abbreviation ZJOI.

Input

The input for this problem is irrelevant to your output; you do not need to read it.

Output

This problem has only one unique answer.

Output a single line containing four uppercase letters, representing the abbreviated name of the Fengjing Province provincial selection contest.

Note

Please do not imagine recklessly; read the problem requirements carefully and output correctly to avoid penalties for errors in this problem.