#include<bits/stdc++.h>
using namespace std;
int main()
{ int n,t;
  cin>>n;
  while(n)
  { t=t*10+n%10;
    n/=10; 
  }
  cout<<t;
	return 0;
}


/**************************************************************
	Problem: 1121
	User: cx001
	Language: C++
	Result: Wrong Answer
****************************************************************/