## Goal

We are looking at a system of inequalities. Here all inequalities are simple and consist of one variable on each side. Considering a system of strict inequalities, determine whether this system is inherently consistent or if there is a flaw. A flaw is a contradiction of two or more inequalities, e.g. A > B > C > A. This is not possible from a logical point of view.
Input

**Line 1:** a positive integer `n`

**The following **`n` lines: inequalities of format LETTER > LETTER

Output

A string "consistent" if all inequalities are consistent or "contradiction" if there is a contradiction found.

Constraints

0 < `n` < 26

LETTER is a single letter in uppercase