#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a,b,h;
	scanf("%d",&n);
	a=n/1000;
	b=n%1000;
	if (b>a){
		h=b*1000+a;
		cout<<h<<endl;
	}
	else {
		h=a*1000+b;
		cout<<h<<endl;
	}
	return 0;
}
/**************************************************************
	Problem: 1631
	User: xiaojingxuan
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/