/*
 * ????1206.cpp
 * ??????
 * ?????2012-12-16
 * ???????????????
 */



int main() {
	char s[101], *p = NULL; //????
	cin.getline(s, 101); //?????
	for (p = s; p < s + strlen(s) - 1; ++p)
		cout << (char) (*p + *(p + 1)); //?????????????
	cout << (char) (*s + *p) << endl; //????????????
	return 0; //????
}