#include<stdio.h>
#include<string.h>
int main()
{
	int i, j, k;
	char s[50], temp;
	gets(s);//输入
	k = strlen(s);//计算字符的长度
	//反向输出
	for (i = 0, j = k - 1;i < k / 2;i++, j--)
	{
		temp = s[i];
		s[i] = s[j];
		s[j] = temp;
	}
	puts(s);//输出
}