csharp, 115 bytes

Result

WA

Code [DL]

using System;class Hello{void Main(){var p = Console.ReadLine().ToCharArray();Array.Sort(p);Console.WriteLine(p);}}

stdin

2228273538180820062597694551187873290228532658106945642465442741688357788937505124145485645396517592

stdout

Compilation failed: 1 error(s), 0 warnings

stderr

error CS5001: Program `code.exe' does not contain a static `Main' method suitable for an entry point
Cannot open assembly '/tmp/code.exe': No such file or directory.
rm: cannot remove '/tmp/code.exe': No such file or directory

strace