#include <algorithm>
#include <iostream>
#include <unordered_map>
#include <vector>
 
using namespace std;
 
int main()
{
	unordered_map<string,vector<string>> komendy = {
		{"slowo1", {"wyraz1", "wyraz2", "wyraz3"}},
		{"slowo2", {"wyraz4", "wyraz5", "wyraz6"}}
	};
 
	vector<string> lista;
 
	string in;
	while(cin >> in){
		auto it = komendy.find(in);
		if(it == end(komendy)) continue;
 
		for(string const& s : it->second){
			auto znaleziono = find(begin(lista),end(lista),s);
			if(znaleziono == end(lista)) lista.push_back(s);
		}
	}
 
	// wypisanie listy
	for(string const& s : lista) cout << s << ", ";
}
 
 

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c2xvd28xCnNsb3dvMgpzbG93bzEKbmllcG9wcmF3bmVzbG93bwpzbG93bzE=

slowo1
slowo2
slowo1
niepoprawneslowo
slowo1