#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,i=0,a=0,s=0,o=0,z=0;
	cin>>x;
		i=x%10;
		a=x%100/10;
		s=x%1000/100;
		o=x/1000;
		z=i*1000+a*100+s*10+o;
		cout<<z;
    }

/**************************************************************
	Problem: 1029
	User: huxuanchen
	Language: C
	Result: Compile Error
****************************************************************/