#include <bits/stdc++.h> using namespace std; int main(){ char s1[110], s2[110]; cin >> s1; int len = strlen(s1); for(int i = 0; i <= len-2; i++){ s2[i] = s1[i] + s1[i + 1]; } s2[len - 1] = s1[0] + s1[len - 1]; for(int i = 0; i <= len-1; i++){ cout << s2[i]; } return 0; }