#include <iostream>
#include <fstream>
#include <algorithm>
#include <math.h>
#include <string>
#include <vector>
#include <stdio.h>
#include <queue>
#include <set>

#define LL long long
#define pb push_back
#define lm 100001
#define MOD 1000000007

using namespace std;
string s;
int main(){

   // freopen("data.txt","r",stdin);
    cin>>s;
    for(int i=0; i<s.size()-1; i++)
    {
        cout<<s[i]<<'-';
    }
    cout<<s[s.size()-1];
    return 0;
}