import java.util.*;
class A
{
	interface P{boolean H(String j);}
	public static void main(String[]args){
		P Q=L->java.util.regex.Pattern.compile("(.+)\\1{4}").matcher(L).find();
		Scanner G=new Scanner(System.in);
		while(G.hasNext()){
			System.out.print(Q.H(G.next()));
			System.out.print('\n');
		}
	}
}