#include<cmath>
#include<queue>
#include<cctype>
#include<vector>
#include<cstdio>
#include<string>
#include<cstring>
#include<iomanip>
#include<iostream>
#include<algorithm>
using namespace std;
string c,family;
int main(){
	cin>>c;
	for(int i=0;i<c.size();i++){
		if(i+1==c.size()){
			family[i]=c[i]+c[0];
		}
		else{
			family[i]=c[i]+c[i+1];
		}
	}
	for(int i=0;i<c.size();i++){
		cout<<family[i];
	}
	return 0;
}