#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: tonghuawei
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/