#include <iostream>
#include <string>
#include <iomanip>
#include <vector>

using namespace std;

struct account {
  int accountNumber;
  int bankNumber;
  int cash;
  account(int accountNumber, int bankNumber, int cash)
    {this->accountNumber = accountNumber; this->bankNumber = bankNumber; this->cash = cash;};
};

#define EPSILON 0

vector<account> accounts;

/*
bool exists(int accountNumber, int bankNumber) {
  for (unsigned int i = 0; i < accounts.size(); i++) {
    if ((accounts[i].accountNumber == accountNumber) && (accounts[i].bankNumber == bankNumber)) {
      return true;
    }
  }
  return false;
}
*/
account* getAccount(int accountNumber, int bankNumber) {
  for (unsigned int i = 0; i < accounts.size(); i++) {
    if ((accounts[i].accountNumber == accountNumber) && (accounts[i].bankNumber == bankNumber)) {
      return &accounts[i];
    }
  }
  return NULL;
}

int main(int, char**)
{
  int accountCount;

  do {
    int accountNumber;
    int bankNumber;
    int accountNumber2;
    int bankNumber2;
    char dummy;
    int cash;
    float floatcash;

    cin >> accountCount;
    if (accountCount > 0) {
      accounts.clear();
      for (int i = 0; i < accountCount; i++) {
        cin >> accountNumber;
        cin >> dummy;
        cin >> bankNumber;

        cin >> floatcash;
        cash = int(floatcash * 100);
        accounts.push_back(account(accountNumber, bankNumber, cash));
      }

      // nacitat instrukce
      string command;
      do {
        cin >> command;
        if (command == "create") {
          cout << "create: ";
          cin >> accountNumber;
          cin >> dummy;
          cin >> bankNumber;
          if (getAccount(accountNumber, bankNumber) != NULL) {
            cout << "already exists" << endl;
          } else {
            accounts.push_back(account(accountNumber, bankNumber, 0));
            cout << "ok" << endl;
          }

        } else if (command == "deposit") {
          cin >> accountNumber;
          cin >> dummy;
          cin >> bankNumber;
          cin >> floatcash;
          cash = int(floatcash * 100);
          cout << "deposit " << fixed << setprecision(2) << floatcash << ": ";
          account *a = getAccount(accountNumber, bankNumber);
          if (a == NULL) {
            cout << "no such account" << endl;
          } else {
            a->cash += cash;
            cout << "ok" << endl;
          }

        } else if (command == "withdraw") {
          cin >> accountNumber;
          cin >> dummy;
          cin >> bankNumber;
          cin >> floatcash;
          cash = int(floatcash * 100);
          cout << "withdraw " << fixed << setprecision(2) << floatcash << ": ";
          account *a = getAccount(accountNumber, bankNumber);
          if (a == NULL) {
            cout << "no such account" << endl;
          } else  if (a->cash + EPSILON < cash) {
            cout << "insufficient funds" << endl;
          } else {
            a->cash -= cash;
            cout << "ok" << endl;
          }

        } else if (command == "transfer") {
          cin >> accountNumber;
          cin >> dummy;
          cin >> bankNumber;
          cin >> accountNumber2;
          cin >> dummy;
          cin >> bankNumber2;
          cin >> floatcash;
          cash = int(floatcash * 100);
          cout << "transfer " << fixed << setprecision(2) << floatcash << ": ";
          account *a = getAccount(accountNumber, bankNumber);
          account *b = getAccount(accountNumber2, bankNumber2);
          if ((a == NULL) || (b == NULL)) {
            cout << "no such account" << endl;
          } else if ((a->accountNumber == b->accountNumber) && (a->bankNumber == b->bankNumber)) {
            cout << "same account" << endl;
          } else if (a->cash + EPSILON < cash) {
            cout << "insufficient funds" << endl;
          } else {
            a->cash -= cash;
            b->cash += cash;
            if (a->bankNumber != b->bankNumber) {
              cout << "interbank" << endl;
            } else {
              cout << "ok" << endl;
            }
          }
        }
      } while (command != "end");
      cout << "end" << endl << endl;

    } else {
      cout << "goodbye" << endl;
    }
  } while (accountCount > 0);

  return 0;
}