#include<bits/stdc++.h>
using namespace std;
int main()
{
    int x,g,s,b,q;
    cin>>x;
    g=x/1%10;
    s=x/10%10;
    b=x/100%10;
    q=x/1000%10;
    cout<<g*1000+s*100+b*10+q*1;
	return 0;
}

/**************************************************************
	Problem: 1029
	User: ccf
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/