#include <iostream>
using namespace std;

int main()
{
    int n, nr,con;
    cin>>n;
    nr=0;
    while(n!=0)
    {
        con=n%10;
        nr=nr*10+con;
        n=n/10;
    }
    while(nr!=0)
    {
        con=nr%10;
        cout<<con;
        if(nr>9)
        {
            cout<<"-";
        }
        nr=nr/10;
    }
    return 0;
}