#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c,d,f,g;
    scanf("%d",&g);
    a=g%10;
    b=g/10%10;
    f=g/100%10; 
    d=g/1000;
    c=a*100+b*1000+f+d*10;
    cout<<c;
}
/**************************************************************
	Problem: 1616
	User: zhangyilei
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/