/* 
 * ????main.cpp
 * ??????
 * ?????2012-12-10
 * ?????????s??????s1?
 *       ?????s1??????????s???????ASCII????????ASCII???????????? ?????s???????ASCII????????ASCII????????????????????????s???????????????????????????s???????ASCII??s???????ASCII??
 */

int main ()
{
	char c[102],*p = NULL;//????c????????*p
	memset(c,0,sizeof(c));//?????
	cin.getline(c,102);
	for ( p = c; *p; p++ )//???c????????
	{
		if ( *(p+1) )//?*p?????0?
			cout << (char)(*p + *(p+1));//???????s1????????
		else//????????c????????
			cout << (char)(*p + *c);
	}
	cout << endl;
	return 0;
}