node, 51 bytes

Result

WA

Code [DL]

f=require(`fs`)f.write(f.readFileSync(0).sort()+'')

stdin

6935480323473103796345970740525724293576065209351505112813716387264056214587177861493085557011168986

stdout

stderr

/volume/CODE:1
(function (exports, require, module, __filename, __dirname) { f=require(`fs`)f.write(f.readFileSync(0).sort()+'')
                                                                             ^
SyntaxError: Unexpected identifier
    at createScript (vm.js:53:10)
    at Object.runInThisContext (vm.js:95:10)
    at Module._compile (module.js:543:28)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:488:32)
    at tryModuleLoad (module.js:447:12)
    at Function.Module._load (module.js:439:3)
    at Module.runMain (module.js:605:10)
    at run (bootstrap_node.js:427:7)
    at startup (bootstrap_node.js:148:9)

strace