#include<iostream>
using namespace std;


void selsort (int inp[],int n)
{
    for(int i = 0;i<n; i++)
    {
        int indexsmall = i;
        for(int j = i+1;j<n;j++)
        {
            if(inp[j]< inp[indexsmall])
            {
             indexsmall = j;
            }
        }
        //swap
        int temp = inp[i];
        inp[i] = inp[indexsmall];
        inp[indexsmall] = temp;
    }
}

int main ()
{
    int arr[5];
    for(int a=0;a<6; a++)
    {
        cin >> arr[a];
    }
    selsort(arr,5);
    for(int a=0;a<6; a++)
    {
        cout << arr[a];
    }


}