#include <iostream>
#include <vector>
#include <string> 
//#include <fstream>
#include <algorithm>

using namespace std;
int s;
vector<string> words,pops;
string temp;


int main() {
	s = 2;
	while (s != 3) {
		while (s == 1) {
			cin >> temp;
			words.push_back(temp);
			for (int i = 0; i <= words.size(); i++) {
				if (temp == "Beepwords" || temp == "beepwords") s = 2;
				if (temp == "Stop" || temp == "stop") s = 3;
				if (pops[i] == words[i]) words[i] = "Beep";
			}

		}

		while (s == 2) {
			cin >> temp;
			pops.push_back(temp);
			for (int i = 0; i <= pops.size(); i++) {
				if (temp == "text" || temp == "Text") s = 1;
				if (temp == "Stop" || temp == "stop") s = 3;
			}

		}
	}

	cout << "Number of words: " << words.size() << endl;

	sort(words.begin(), words.end());

	for (int i = 0; i < words.size(); i++)
		if (i == 0 || words[i - 1] != words[i])
			cout << words[i] << "\n";

	return 0;
}

this	0x00ebd304 {asdasdad.exe!std::vector<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > words} { size=1 }
	std::vector<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char> > > > *

for (size_t i = 0; i != words.size(); i++) {

if (pops[i] == words[i]) words[i] = "Beep";