/*
This one was easy, you should have figured it by yourself
IMPORTANT HINT: do not print the EOF character

*/

#include<stdio.h>
#include<ctype.h>
int main()
{
char s[256],ch;
int poz=-1;
scanf("%c",&ch);
while(!feof(stdin))
    {
    if (isalpha(ch))
        {
        poz++;
         s[poz]=ch;
        }
    else
        if (!feof(stdin))
        {
        if (poz!=-1)
            {
            while(poz>=0)
                {
                printf("%c",s[poz]);
                   poz--;
                }
            }
         printf("%c",ch);
        }
    scanf("%c",&ch);
    }
while(poz>=0)
    {
    printf("%c",s[poz]);
    poz--;
    }
return 0;
}