package yukicoder342;
import java.util.PriorityQueue;
import java.util.Scanner;
public class Main {
	static class Tuple implements Comparable<Tuple>{
		String str;
		int count;
		Tuple(String str,int count){
			this.str=str;
			this.count=count;
		}
		public int compareTo(Tuple o){
			int a=Integer.compare(o.count, count);
			if(a==0)return 1;
			return a;
		}
	}
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		String str=sc.nextLine();
		PriorityQueue<Tuple> queue=new PriorityQueue(100);
		String str2="";
		int count=0;
		for(int i=0;i<str.length();i++){
			if(str.charAt(i)=='ｗ'&&i==str.length()-1){
				count++;
				queue.add(new Tuple(str2,count));
			}else if(str.charAt(i)!='ｗ'){
				if(i>=1){
					if(str.charAt(i-1)=='ｗ'){
						if(!str2.equals("")){
							queue.add(new Tuple(str2,count));
						}
						str2="";
						count=0;
					}
				}
				str2+=str.charAt(i);
			}else if(str.charAt(i)=='ｗ'){
				count++;
			}
		}
		if(queue.isEmpty()){
			System.out.println();
			System.exit(0);
		}
		int a=queue.peek().count;
		while(!queue.isEmpty()){
			Tuple t=queue.poll();
			if(a!=t.count)break;
			System.out.println(t.str);
		}
//		System.err.println("End");
		sc.close();
	}
}