#include <iostream>
#include <string>
#include <sstream>
#include <fstream>
#include <vector>
#include <map>

using namespace std;

class Node {
	char _name;
	map<char, Node*> _links;
  public:
	Node();
	Node(char name);
	void linkNode(char edge, Node* node);
};

Node::Node(char name) {
	_name = name;
}

void Node::linkNode(char edge, Node* node) {
	_links[edge] = node;
}

void addNodes(vector<Node*>* nodes, char edge, Node * node1, Node * node2) {
	node1->linkNode(edge, node2);
	node2->linkNode(edge, node1);
	nodes->push_back(node1);
	nodes->push_back(node2);
}

int main() {
	ostringstream output;
	vector<Node*> nodes;
	while (true) {
		cout << "graphprog> ";
		string cmd;
		char n1, n2, edge;
		cin >> cmd;
		if (cmd == "add") {
			cin >> edge >> n1 >> n2;	
			output << edge << " " << n1 << " " << n2 << endl;
			addNodes(&nodes, edge, new Node(n1), new Node(n2)); 
		}
		else if (cmd == "write") {
			string outfileName;
			cin >> outfileName;
			ofstream outfile(outfileName.c_str());
			outfile << output.str();
		}
		else if (cmd == "show") {
			
			//cout << output.str();
		}
		else if (cmd == "quit") {
			break;
		}
		else {
			cerr << "Invalid command." << endl;
		}
	}
	return 0;
}