#include <stdio.h>

#include "genlib.h"
#include "simpio.h"
#include "string.h"

void reverse(char s[]);

main()
{
	string s;
	s=GetLine();
	reverse(s);
	printf("%s\n",s);
}

void reverse(char s[])
{
	int i,n1;
	char temp;
	n1=strlen(s);
	for(i=0;i<n1/2;i++)
	{
		temp=s[i];
		s[i]=s[n1-i-1];
		s[n1-i-1]=temp;
	}
}