#include <iostream>

using namespace std;

int a, v[50], i, cnt;

int main()
{
    cin >> a;

    if(a >= 0 && a <= 9)
        cout << a;

    else
    {
        while(a)
        {
            v[++cnt] = a % 10;
            a = a / 10;
        }

        cout << v[cnt] << "-";
        for(i = cnt-1; i >= 2; i--)
            cout << v[i] << "-";
        cout << v[1];
    }

}