#include <iostream>
#include <string>
#include <map>

using namespace std;

typedef map<string,string>::iterator ite;

int main() {
	string s;
	map<string,string> liats;
	while(cin >> s) {
		if (s == "affair") {
			string x, y;
			cin >> x >> y;
			if (liats[x] != "") liats[liats[x]] = "";
			if (liats[y] != "") liats[liats[y]] = "";
			liats[x] = y;
			liats[y] = x;
		}
		else {
			cout << "COUPLES:" << endl;
			for (ite it = liats.begin(); it != liats.end(); ++it)
				if (it->second != "" and it->first < it->second)
					cout << it->first << " " << it->second << endl;
			cout << "ALONE:" << endl;
			for (ite it = liats.begin(); it != liats.end(); ++it)
				if (it->second == "")
					cout << it->first << endl;
			cout << "----------" << endl;
		}
	}
}