#include<bits/stdc++.h> 
using namespace std;
int main(){
	int n,g,s,b,q,a;
   	cin>>n;
   	g=n%1000;
   	s=n/10%100;
   	b=n/100%10;
   	q=n/1000;
   	a=g*1000+s*100+b*10+q*1;
   	cout<<a;
}
/**************************************************************
	Problem: 1029
	User: lijinkai
	Language: C++
	Result: Wrong Answer
****************************************************************/