#include <iostream>
#include <string>
using namespace std;
int main(){
    int n;
    cin >> n;
    string s;
    s += (char)(n%10 + '0');
    n /= 10;
    while(n >0){
        string c = s;
        s = (char)(n%10 + '0');
        s+= "-";
        s+=c;
        n /= 10;
    }
    cout << s;
    return 0;
}