import java.util.Scanner;

import java.util.InputMismatchException;

public class VoltageLevelsExceptHandling $\{$

public static void main$($String$[]$ args$)\{$

Scanner scnr $=$ new Scanner$($System$.$in$)$;

double voltageLevel;

while $($scnr$.$hasNext$())\{$

try $\{$

voltageLevel $=$ scnr$.$nextDouble$()$;

if $($voltageLevel $>=3\mathrm{.}6)\{$

System.out.println$("$on$")$;

$\}$

else if $($voltageLevel $>=0\mathrm{.}0$ && voltageLevel $<=1)\{$

System.out.println$("$off$")$;

$\}$

else $\{$

System.out.println$("?")$;

$\}$

$\}$

catch $($InputMismatchException excpt$)\{$

System.out.println$("$Error getting input"$)$;

scnr$.$next$()$;

$\}$

$\}$

$\}$

$\}$