#include <iostream>
#include <string.h>
using namespace std;
int main()
{
char cuvant[21];
int len, stanga, dreapta, i;
cin.getline(cuvant,21);
len=strlen(cuvant);
stanga=0; dreapta=len-1;
while (stanga<=dreapta)
{
for (i=stanga; i<=dreapta; ++i)
cout << cuvant[i];
cout << "\n";
++stanga;
--dreapta;
}
return 0;
}