import java.io.*;

public class Triangle_rule {
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        int a = Integer.parseInt(reader.readLine());
        int b = Integer.parseInt(reader.readLine());
        int c = Integer.parseInt(reader.readLine());
        if ((a+b) > c && (a+c) > b && (b+c) > a)
            System.out.println("Triangle exists");
        else
            System.out.println("Triangle doesn't exist");
    }
}