#include<bits/stdc++.h> using namespace std; int main(){ int n,a,b,c,t; cin>>n; a=n/100; b=n/10%10; c=n%10; if(a<b){ t=a; a=b; b=t; } if(b<c){ t=b; b=c; c=t; } if(a<b){ t=a; a=b; b=t; } cout<<a<<b<<c; return 0; }