#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
int main()
{
vector<string> words;
string temp;
 while (cin>>temp) // считываем слова, отделенные разделителями
  words.push_back(temp); // заносим в вектор
 
cout << "Количество слов: " << words.size() << endl;
sort(words.begin(),words.end()); // сортируем весь вектор
 
 for (unsigned int i = 0; i < words.size(); ++i)
 	if(i==0 || words[i-1] !=words[i]) // это новое слово?
   		cout << words[i] << "\n";
}

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