csharp, 149 bytes

Result

ERROR

Code [DL]

using System;public class Test{public static void Main(){var l=Console.ReadLine().ToCharArray();Array.Sort(l);Console.WriteLine(string.Join("",l));}}

stdin

8429966261829290899746055471186093985905413234084715293650668800172578167114069073863020564005471108

stdout

stderr

strace