#include<stdio.h>
#include<string.h>
#include<stdlib.h>

char obrat(char ret[],int a)
{
	int i,j=0;
	char *ret1;
	ret1=(char*)malloc(a+1);

	for (i=a;i>=0;i--)
	{
		ret1[j++]=ret[i];
	}
	return ret1;
}




int main()
{
	int a;
	char ret[256];

	printf("prvy\n");
	fgets(ret,256,stdin);
	a=(strlen(ret));
	printf("%d\n",a);

	printf("%s",obrat(ret,a));
	return 0;
}