#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,s,a,b,c,d;
	cin>>x;
	a=x%10;
	b=x/10%10;
	c=x/100%10;
	d=x/1000;
	s=a*1000+b*100+c*10+d;
	cout<<s;
	return 0;
}
 
/**************************************************************
	Problem: 1029
	User: panyuchen
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/