#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

using System;

class Program {
    static void Main(string[] args) {
        int ch = Console.Read();
        string priklad = "";
        int count = 0;

        while (true) {
            priklad += (char)ch;
            if (ch == '\n') {
                count++;
            }
            ch = Console.Read();
            if ((priklad[priklad.Length - 1] == '\n' && ch == '\n') || ch == -1) {
                break;
            }
        }

        string start = priklad;
        string end = null;

        for (int c = 0; c < count; c++) {
            int skip = 0, z = 0;

            for (int idx = 0; start[idx] != '\n'; idx++) {
                if (start[idx] == '+' || start[idx] == '-' || start[idx] == '*' || start[idx] == '/') {
                    z = 1;
                }
                if ((start[idx] < '0' || start[idx] > '9') && start[idx] != ' ' && start[idx] != '=' && start[idx] != '+' && start[idx] != '-' && start[idx] != '*' && start[idx] != '/' && start[idx] != '.') {
                    skip = 1;
                    Console.WriteLine("CHYBA");
                    while (start[0] != '\n') {
                        start = start.Substring(1);
                    }
                    start = start.Substring(1);
                    break;
                }
            }

            if (skip == 1) {
                continue;
            }
            if (z == 0) {
                while (start[0] != '\n') {
                    start = start.Substring(1);
                }
                start = start.Substring(1);
                Console.WriteLine("CHYBA");
                continue;
            }
            float num1 = float.Parse(start, out end);
            if (end == start) {
                Console.WriteLine("KONIEC");
            }
            while (start[0] != '+' && start[0] != '-' && start[0] != '/' && start[0] != '*') {
                start = start.Substring(1);
            }
            char znak = start[0];
            start = start.Substring(1);

            float num2 = float.Parse(start, out end);
            start = end;
            while ((start[0] < '0' || start[0] > '9') && start[0] != '-') {
                start = start.Substring(1);
            }

            float vysledok2 = float.Parse(start, out end);
            start = end;
            start = start.Substring(1);
            float vysledok = 0;

            if (znak == '-') {
                vysledok = num1 - num2;
            } else if (znak == '+') {
                vysledok = num1 + num2;
            } else if (znak == '*') {
                vysledok = num1 * num2;
            } else if (znak == '/') {
                vysledok = num1 / num2;
            }
            vysledok = (float)Math.Round(vysledok * 100) / 100;
            if (Math.Abs(vysledok2 - vysledok) < 0.001) {
                Console.WriteLine("OK");
            } else {
                Console.WriteLine("ZLE");
            }
        }
    }
}