#include<iostream>
#include<cstdio>
#include<string>
using namespace std;
int main()
{
	char a[100],p;
	long long c,d,b,e;
	int i;
	b=-1;d=0;e=0;
	fgets(a,sizeof(a),stdin);
	sscanf(a,"%lld%c%lld",&c,&p,&b);
	for(i=0;c>0;i++)
	{
		d=d*10;
		d+=c%10;
		c=c/10;
	}
	if(b>-1)
	{
	for(;b>0;)
	{
		e=e*10;
		e+=b%10;
		b=b/10;
	}
	cout<<d<<a[i]<<e;	
	}
	else
	cout<<d<<a[i];
}