#include <iostream>
#include <map>

using namespace std;


map<string, double> Ucty;


char getBankCode(string s)
{
	return s[s.length() -1];
}


bool readUcty()
{
	int n;
	cin >> n;
	if (n == 0) return false;
	
	while (n--> 0)
	{
		string ucet;
		double suma;
		cin >> ucet >> suma;
		Ucty.insert(make_pair(ucet, suma));
		
		//cout << ucet << suma <<endl;
		
		//cout << Ucty[ucet] << endl;
	}
	return true;
}

bool keyExists(map<string, double> &m, string key)
{
	return (m.find(key) != m.end());
}

void printOutput(string instruction, double suma, char * msg)
{
	cout << instruction << " ";
	printf("%.2f", suma);
	cout << ": " << msg << endl;
}

void printOutput(string instruction, char *msg)
{
	cout << instruction << ": " << msg << endl;
}

int main()
{
	while (readUcty())
	{
		string instruction;
		cin >> instruction;
		while (instruction != "end")
		{
			string ucet, ucet2;
			double suma;
			if (instruction == "withdraw")
			{
				cin >> ucet >> suma;
				if (keyExists(Ucty, ucet))
				{
					if (Ucty[ucet] > suma)
					{
						Ucty[ucet] += suma;
						printOutput(instruction, suma, "ok");
					}
					else
					{
						printOutput(instruction, suma, "insufficient funds");
					}
				}
				else
				{
					printOutput(instruction, suma, "no such account");
				}
			}
			else if (instruction == "deposit")
			{
				cin >> ucet >> suma;
				if (keyExists(Ucty, ucet))
				{
					Ucty[ucet] += suma;
					printOutput(instruction, suma, "ok");
				}
				else printOutput(instruction, suma, "no such account");
			}
			else if (instruction == "create")
			{
				cin >> ucet;
				if (keyExists(Ucty, ucet))
					printOutput(instruction, "already exists");
				else 
				{
					Ucty[ucet] = 0;
					printOutput(instruction, "ok");
				}
			}
			else if (instruction == "transfer")
			{
				cin >> ucet >> ucet2 >> suma;
				if (ucet == ucet2) printOutput(instruction, suma, "same account");
				else if ((!keyExists(Ucty, ucet)) || (!keyExists(Ucty, ucet2)))
					printOutput(instruction, suma, "no such account");
				else
				{
					if (Ucty[ucet] < suma) printOutput(instruction, suma, "insufficient funds");
					else
					{
						Ucty[ucet] -= suma;
						Ucty[ucet2] += suma;
						if (getBankCode(ucet) != getBankCode(ucet2))
							printOutput(instruction, suma, "interbank");
						else printOutput(instruction, suma, "ok");
					}
				}
			}
			cin >> instruction;
			//cout << instruction;
		}
		cout << endl;
	}
	cout << "goodbye" << endl;

	return 0;
}