#include<bits/stdc++.h>
using namespace std;
int main(){
  int n;
  cin>>n;
  int s,b,q,g;
  
  s=n/1%10;
  b=n/10%10;
  q=n/100%10;
  g=n/1000%10;
  cout<<s*1000+b*100+q*10+g;
    return 0;
}
/**************************************************************
	Problem: 1029
	User: wangyousi
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/