#include<bits/stdc++.h>
using namespace std;

#define endl '\n'

const int N=1e5+5;
#define int long long
#define mp make_pair


void solve()
{
    int a=0,b=0;
    scanf("%d-%d",&a,&b);
    // cout<<a<<' '<<b<<endl;
    // cout<<c<<endl;
    cout<<max(a,b)<<'-'<<min(a,b)<<endl;
    return;
}

signed main()
{
    // ios::sync_with_stdio(0);
    // cin.tie(0);cout.tie(0);
    int T;
    // cin>>T;
    T=1;
    while(T--)
        solve();
    return 0;
}