using System;

namespace StreamOfLetters
{
    class StreamOfLetters
    {
        static void Main(string[] args)
        {
            int letterC = 0;
            int letterN = 0;
            int letterO = 0;
            char letterChar = '0';
            string word = "";
            string endWords = "";
            bool letterCheck =false   ;
            while (true)
            {
                string letter = Console.ReadLine();
                if (letter == "End") break;
                else
                {
                    letterChar = letter[0];
                    letterCheck = ((letterChar >= 65 && letterChar <= 90) || (letterChar >= 97 && letterChar <= 122));
                    if (!letterCheck)
                    {
                        continue;
                    }

                        switch (letterChar)
                        {
                            case 'n':
                                {
                                    if (letterN == 0)
                                    { letterN = 1; }
                                    else
                                    { word = word + letterChar; }
                                    break;
                                }
                            case 'c':
                                {
                                    if (letterC == 0)
                                    { letterC = 1; }
                                    else
                                    {
                                        word = word + letterChar;
                                    }
                                    break;
                                }
                            case 'o':
                                {
                                    if (letterO == 0)
                                    { letterO = 1; }
                                    else
                                    {
                                        word = word + letterChar;
                                    }
                                    break;
                                }
                            default: { word = word + letterChar; break; }
                        }
                        if ((letterN + letterC + letterO) == 3)
                        {
                        // Console.WriteLine(word + " ");
                        endWords = endWords + word+" ";
                            word = "";
                            letterC = 0;
                            letterN = 0;
                            letterO = 0;
                        }


                }

            }
            Console.WriteLine(endWords);
        }
    }
}