#include<bits/stdc++.h>
using namespace std;
 
int main(){
   int n,g,s,b,q;
   cin>>n;
   q=n/1000%1000;
   b=n/100%10;
   s=n/10%10;
   g=n%10;
   cout<<(g*1000+s*100+b*10+q);
   return 0;
}
 
/**************************************************************
	Problem: 1029
	User: zhengyuxuan
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/