#include <iostream>
#include<cstring>
#include<stdlib.h>
using namespace std;
char s[102];
int main()
{
    int n;
    char s1[2]="";
    do{cin>>n;}while(!(n>=0 && n<1000000000));
    if(n<10)
    {cout<<n;}
    else{
    strcat(s,itoa(n%10,s1,10));
    n/=10;
    while(n)
    {
        strcat(s,"-");
        strcat(s,itoa(n%10,s1,10));
        n/=10;
    }
    cout<<strrev(s);}
    return 0;
}