#include <stdio.h>

int main(void)
{
	char arr[255];
	int i = 0;
	while (scanf("%c", &arr[i]) != EOF)
	{
		scanf("%c", &arr[i]);
		i++;
	}
	for (i = i; i >= 0; i--)
	{
		printf("%c", arr[i]);
	}
	return 0;
}