import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double t0 = scanner.nextDouble();
        double th = scanner.nextDouble();
        double tc = scanner.nextDouble();
        double t = scanner.nextDouble();
        if (t0 > t) {
            System.out.print("cooler ");
            double res = (t0 - t) / tc;
            res *= 100d;
            res = Math.round(res);
            res /= 100d;
            System.out.print(res);
        } else {
            System.out.print("heater ");
            double res = (t - t0) / th;
            res *= 100d;
            res = Math.round(res);
            res /= 100d;
            System.out.print(res);
        }
    }
}