#include <bits/stdc++.h>
typedef long long ll;
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,a) FOR(i,0,a)
	
using namespace std;
vector<ll> ans;
int main(){
	ll N;
	scanf("%lld",&N);
	if(N==0){
		ans.push_back(0);
	}
	while(N>0){
		ans.push_back(N%1000);
		N/=1000;
	}
	REP(i,(int)ans.size()){
		if(i)printf(",");
		printf("%lld",ans[(int)ans.size()-1-i]);
	}
	printf("\n");
}