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