#include<bits/stdc++.h>
  using namespace std;
  const int N=100001;
  char a[N];
  char b[N];
  int main()
  {
  	cin>>a;
  	int n=strlen(a);
  	for(int i=0;i<=n;i++)
  	{
  		b[i]=a[i]+a[i+1]
  		if(i==n-1)
  		{
  			b[i]=a[0]+a[i];
  		}
  	}
  	cout<<b;
  	return 0;
  }