#include <iostream>

using namespace std;

int main()
{
    int n, v[10], i, nr;
    cin>>n; i=0;
    while(n>0)
    {
        i++;
        v[i]=n%10;
        n=n/10;
    }
    nr=i;
    cout<<v[nr];
    for(i=nr-1; i>=1; i--)
        cout<<"-"<<v[i];
    return 0;
}