#include<bits/stdc++.h>
using namespace std;
char s[101],s1[101];
int main()
{
	cin>>s;
	int len=strlen(s);
	for(int i=0;i<len;i++)
	{
		s1[i]=s[i]+s[i+1];
		s1[len-1]=s[0]+s[len-1];
	}
	cout<<s1;
}