#include <iostream>
#include <cstring>

using namespace std;

const int N = 110;

char b[N];

int main(void)
{
    string a;
    getline(cin, a);
    for (int i = 0; i < a.size(); i++) {
        if (i == a.size() - 1) {
            b[i] = a[i] + a[0];
            break;
        }
        b[i] = a[i] + a[i+1];
    }
    cout << b << endl;
    return 0;
}