//
// Created by lan on 2024/4/4.
//
输出字符串
#include <iostream>
using namespace std;
int main() {
string x, y;
getline(cin, x);
for (int i = 0; i < x.size(); i++) {
// 取模判断i+1如果是0就取第一个字符
y += (char) (x[i] + x[(i + 1) % x.size()]);
}
cout << y << endl;
return 0;
}