#include<bits/stdc++.h>
	using namespace std;
	int main()
	{
	//freopen(".in","r",stdin);
	//freopen(".out","w",stdout);
	int a;
	cin>>a;
	while(a!=0)
	{
		int temp=a%10;
		cout<<temp;
		temp/=10;
	}
	return 0;
 }