using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace No342_1{
    public class Program{
        public static void Main(string[] args){
            const char constChar = 'ｗ';
            var charList = Console.ReadLine().SkipWhile(c => c == constChar).ToList();
            var strList = new List<string>();
            if(charList.Count == 0 || !charList.Exists(c => c == constChar)){
                Console.WriteLine();
                return;
            }

            var sb = new StringBuilder();
            sb.Append(charList[0]);
            for(var i = 1; i < charList.Count; i++){
                if(charList[i - 1] == constChar && charList[i] != constChar){
                    strList.Add(sb.ToString());
                    sb.Clear();
                }
                sb.Append(charList[i]);
            }
            strList.Add(sb.ToString());

            Func<string, int> charCount = s => s.Count(c => c == constChar);
            strList.Where(s => charCount(s) == strList.Max(charCount)).ToList()
                .ForEach(s => {
                    s.TakeWhile(c => c != constChar).ToList().ForEach(Console.Write);
                    Console.WriteLine();
                });
        }
    }
}