#include <iostream>
#include <cstdio>
#include <bits/stdc++.h>
using namespace std;
bool cmp(int s1,int s2)
{
    int sum,num;
    while(s1)
    {
        sum=s1%10;
        s1/=10;
    }
    while(s2)
    {
        num=s2%10;
        s2/=10;
    }
    return sum>num;
}
int main()
{
    int a[3];
    cin>>a[1]>>a[2]>>a[3];
    sort(a+1,a+3+1,cmp);
    cout<<a[1]<<a[2]<<a[3];
    return 0;
}