import java.io.*;
import java.util.*;

public class Exercise33{
  public static void main (String[] args) throws IOException{

    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String str = new String(in.readLine());

    char[] charArray = str.toCharArray();

    ArrayList<ResultStr> strList = new ArrayList<ResultStr>();

    boolean preW = false;
    boolean getChar = false;
    boolean empty = true;

    int wCount = 0;
    int maxW = 0;

    for (int n = charArray.length - 1; n >= 0; n--){
      // wは全角注意
      if (charArray[n] == 'ｗ'){
        if (preW){
          wCount++;
        }else{
          preW = true;
          wCount++;
        }

        if (getChar){
          getChar = false;
        }
      // w以外の文字の時
      }else{
        // 候補1文字目
        if(preW){
          // Wcountをmaxと比較
          maxW = Math.max(wCount, maxW);
          if (wCount == maxW){
            getChar = true;
            // すでに候補がなければ
            if (strList.isEmpty()){
              ResultStr newStr = new ResultStr(wCount);
              strList.add(0, newStr);
            // あれば
            }else{
              ResultStr resultStr = strList.get(0);
              if (wCount > resultStr.numOfW){
                strList.clear();
                ResultStr newStr = new ResultStr(wCount);
                strList.add(0, newStr);
              }else if(wCount == resultStr.numOfW){
                ResultStr newStr = new ResultStr(wCount);
                strList.add(0, newStr);
              }
            }
          }
          preW = false;
          wCount = 0;
        }
        // 候補1文字目終わり
        // 2文字目以降
        if (getChar){
          ResultStr resultStr = strList.get(0);
          resultStr.push(charArray[n]);
        }
      }
    }

    for (int j = 0; j < strList.size(); j++){
      ResultStr resultStr = strList.get(j);
      char[] answerArray = new char[resultStr.strArray.size()];
      for (int a = 0; a < resultStr.strArray.size(); a++){
        answerArray[a] = resultStr.strArray.get(a);
      }
      String answer = String.valueOf(answerArray);
      System.out.println(answer);
      empty = false;
    }

    if(empty){
      System.out.println("");
    }
  }
}

class ResultStr {
  int numOfW;
  LinkedList<Character> strArray;

  ResultStr(int num) {
    numOfW = num;
    strArray = new LinkedList<Character>();
  }

  void push(char chars){
    strArray.push(chars);
  }
}