s=input().strip('[]')
x=list(map(int,s.split(',')))
x.sort()
x_list=''.join(map(str,x))
result=int(x_list)
print(result)
cz1pbnB1dCgpLnN0cmlwKCdbXScpCng9bGlzdChtYXAoaW50LHMuc3BsaXQoJywnKSkpCnguc29ydCgpCnhfbGlzdD0nJy5qb2luKG1hcChzdHIseCkpCnJlc3VsdD1pbnQoeF9saXN0KQpwcmludChyZXN1bHQp