package test;

import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Queue;
import java.util.Scanner;
import java.util.Vector;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String str = sc.next();
		char s[] = str.toCharArray();
		int max_n = 0,now = 0,st = 0;
		for(int i = 0;i < str.length();i++){
			if(s[i] == 'ｗ')st++;
			else break;
		}
		for(int i = st;i < str.length();i++){
			if(s[i] == 'ｗ'){
				now++;
			}else{
				max_n = Math.max(max_n, now);
				now = 0;
			}
		}
		max_n = Math.max(max_n,now);
		ArrayList<String> list = new ArrayList<String>();

		String last = new String();
		int how = 0;
		for(int i = st;i < str.length();i++){
			if(s[i] == 'ｗ'){
				how++;
			}else{
				if(how != 0){
					if(how == max_n){
						list.add(last);
					}
					how = 0;
					last = "";
				}
				last += "" + s[i];
			}
		}
		if(how == max_n && !last.equals("")){
			list.add(last);
		}
		if(list.size() == 0 || max_n == 0){
			System.out.println("");
		}else{
			for(int i = 0;i < list.size();i++){
				System.out.println(list.get(i));
			}
		}
	}
}