import java.util.ArrayList;
import java.util.Scanner;

public class No342 {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		String S = scan.nextLine();
		scan.close();
		int max = 0;
		ArrayList<Info> list = new ArrayList<>();
		
		if(S.charAt(0) == 'ｗ') {
			int count = 0;
			for(int i=0; i<S.length(); i++) {
				if(!(S.charAt(i) == 'ｗ')) {
					break;
				}
				count++;
			}
			S = S.substring(count);
		}
		
		for(int i=0; i<S.length(); i++) {
			if(S.charAt(i) == 'ｗ') {
				int count = 0;
				int index = i;
				int j;
				for(j=i; j<S.length(); j++) {
					if(!(S.charAt(j) == 'ｗ')) {
						break;
					}
					count++;
				}
				i=j+1;
				list.add(new Info(index, count));
				max = Math.max(max, count);
			}
		}
		
		if(list.size() == 0) {
			System.out.println();
		} else {
			
			for(Info look : list) {
				if(look.length == max) {
					int first = 0;
					for(int i=look.index-1; i>=0; i--) {
						if(S.charAt(i) == 'ｗ') {
							first = i+1;
							break;
						}
					}
					String ans = S.substring(first, look.index);
					System.out.println(ans);
				}
			}
			
		}
	}
}

class Info {
	int index;
	int length;
	Info(int index, int length) {
		this.index = index;
		this.length = length;
	}
}