python3, 31 bytes

Result

AC

Code [DL]

print(''.join(sorted(input())))

stdin

9265702904999928306442249498189189981989594494645224638191397592095686056748071311966800824591291576

stdout

0000000011111111112222222222333344444444444455555555666666666677777888888888889999999999999999999999

stderr

strace