//*************************************************
//***??????????***
//***??????***
//***???2012.12.8***
//*************************************************
int main ()
{
	char a[101],t,i = 0,*p;
	cin.getline(a,101,'\n');   //??
	t = a[0];                  //??a[0]
	p = &a[1];                 
	while (*p != '\0')         //p?a[]???????????????a[0]????????
	{
		a[i] = *p + *(p - 1);
		i++; p++;
	}
	a[i] = a[i] + t;           //????????
	cout << a << endl;
	return 0;
}