#include <bits/stdc++.h>
using namespace std;
int main()
{
	int a,a2=0,b;
	cin>>a;
	while(a>0)
	{
	  b=a%10;
	  a2=a2*10+b;
	  a=a/10;
	}
	cout<<a2<<endl;
	return 0; 
}