#include <iostream>
#include <iomanip>
#include <vector>
using namespace std;

class Account
{
  private:
    double m_money;
    int m_acc;
    
  public:
    Account(int acc, double money)
    {
      m_acc = acc;
      m_money = money;
    }
    
    int getAcc() const
    {
      return m_acc;
    }
    
    double getMoney() const
    {
      return m_money;
    }
    
    void setMoney(double m)
    {
      m_money = m;
    }
    
    bool checkFunds(double money)
    {
      return m_money >= money;
    }
    
    void withdraw(double money)
    {
      cout << "withdraw " << fixed << setprecision(2) << money << ": ";
      if(checkFunds(money))
      {
        m_money -= money;
        cout << "ok" << endl;
      }
      else
      {
        cout << "insufficient funds" << endl;
      }
    }
    
    void deposit(double money)
    {
      m_money += money;
      cout << "deposit " << fixed << setprecision(2) << money << ": ok" << endl;
    }
    
    void transfer(double money, Account &dest)
    {
      if(!checkFunds(money))
      {
        cout << "transfer " << money << ": insufficient funds" << endl;
        return;
      }
      if((m_acc % 10) != (dest.getAcc() % 10))
      {
        cout << "transfer " << money << ": interbank" << endl;
      }
      else
      {
        cout << "transfer " << money << ": ok" << endl;
      }
      //odecet
      setMoney(m_money - money);
      //pricist
      dest.setMoney(dest.getMoney() + money);
    }
};

void getInput(int &acc, double &money)
{
  int bank;
  cin >> acc; cin.get();
  cin >> bank;
  cin >> money;
  acc = acc * 10 + bank;
  //cout << "pepa " << money << endl;
}

int main()
{
  const int size = 100000;
  Account *accs[size];
  for(int i = 0; i < size; ++i)
    accs[i] = NULL;
  
  vector<int> accounts;
  int count, acc, bank, acc2;
  double money;
  string cmd;
  
  while(1)
  {
    cin >> count;
    if(count == 0)
    {
      cout << "goodbye" << endl;
      break;
    }
    for(int i = 0; i < count; ++i)
    {
      // nactem ucet a castku
      getInput(acc, money);
      if(accs[acc] != NULL)
      {
        cout << "create: already exists" << endl;
        continue;
      }
      accounts.push_back(acc);
      accs[acc] = new Account(acc, money);
    }
  
  cin >> cmd;
    while(cmd != "end")
    {
      if(cmd == "create")
      {
        cin >> acc; cin.get();
        cin >> bank;
        acc = acc * 10 + bank;
        //cout << "pepa smrdi " << acc << endl;
        if(accs[acc] != NULL)
        {
          cout << "create: already exists" << endl;
          cin >> cmd;
          continue;
        }
        accounts.push_back(acc);
        accs[acc] = new Account(acc, 0.0);
        cout << "create: ok" << endl;
      }
      else if(cmd == "withdraw")
      {
        getInput(acc, money);
        if(accs[acc] == NULL)
        {
          cout << "withdraw "<< money << ": no such account" << endl;
          cin >> cmd;
          continue;
        }
        accs[acc]->withdraw(money);
      }
      else if(cmd == "deposit")
      {
        getInput(acc, money);
        if(accs[acc] == NULL)
        {
          cout << "deposit "<< money << ": no such account" << endl;
          cin >> cmd;
          continue;
        }
        accs[acc]->deposit(money);
      }
      else if(cmd == "transfer")
      {
        // ucet1
        cin >> acc; cin.get();
        cin >> bank;
        acc = acc * 10 + bank;
        // ucet2
        cin >> acc2; cin.get();
        cin >> bank;
        acc2 = acc2 * 10 + bank;
        // castka
        cin >> money;
        //kontrola
        
        //cout << "###pepa " << acc << " " << acc2 << endl;
        if((accs[acc] == NULL) || (accs[acc2] == NULL))
        {
          cout << "transfer " << money << ": no such account" << endl;
          cin >> cmd;
          continue;
        }
        if(accs[acc] == accs[acc2])
        {
          cout << "transfer " << money << ": same account" << endl;
          cin >> cmd;
          continue;
        }
        accs[acc]->transfer(money, *accs[acc2]);
      }
      cin >> cmd;
    }
    cout << "end" << endl;

    for(int i = 0; i < accounts.size(); ++i)
    {
        delete accs[accounts[i]];
        accs[accounts[i]] = NULL;
    }
    accounts.clear();
    cin.get(); // prazdnej radek
    cin.get(); // prazdnej radek
    cout << endl;
  }
  
  return 0;
}