#include<bits/stdc++.h>
using namespace std;
int a,b,c,d,s,q;
int main(){
    cin>>q;;
    a=q%10;
    b=q/10%10;
    c=q/100%10;
    d=q/1000;
    s=a*1000+b*100+c*10+d;
    printf("%d",s);
     
}
/**************************************************************
	Problem: 1029
	User: chenyichuen
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/