#include <bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c,d,x,n;
    cin>>a;
    b=a%10;
    c=a/10%10;
    d=a/100%10;
    x=a/1000;
    n=b*10+c*1+d*1000+x*100;
    cout<<n;
}
/**************************************************************
	Problem: 1619
	User: zhangyilei
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/