#include <iostream>
#include <sstream>
#include <iomanip>
#include <cmath>
using namespace std ;

int main()
{
    int account[1100] ;
    double amount[1100], p ;

    int count, tmp, aux, help ;
    char dummy ;
    bool exist;
    string s ;

    while (true)
    {
        (cin >> count).get() ;

        if (count == 0)
            break ;

        for (int i = 0 ; i < count ; i++)
        {
            getline(cin, s) ;
            istringstream is(s) ;
            is >> account[i] ;
            is >> dummy ;
            is >> tmp ;
            is >> amount[i] ;
            account[i] *= 10 ;
            account[i] += tmp ;
        }

        while (true)
        {
            getline(cin, s) ;

            istringstream is(s) ;
            is >> s ;

            if (!strcmp(s.c_str(), "end"))
            {
                cout << "end" << endl << endl ;
                break ;
            }

            if (!strcmp(s.c_str(), "create"))
            {
                is >> tmp ;
                is >> dummy ;
                is >> aux ;
                tmp *= 10 ;
                tmp += aux ;

                exist = false ;

                for (int i = 0 ; i < count ; i++)
                {
                    if (account[i] == tmp)
                    {
                        exist = true ;
                        break ;
                    }
                }

                if (exist)
                    cout << "create: already exists" << endl ;
                else
                {
                    cout << "create: ok" << endl ;
                    account[count] = tmp ;
                    amount[count++] = 0 ;
                }
            }
            else  if (!strcmp(s.c_str(), "withdraw"))
            {
                is >> tmp ;
                is >> dummy ;
                is >> aux ;
                tmp *= 10 ;
                tmp += aux ;

                is >> p ;

                exist = false ;

                for (int i = 0 ; i < count ; i++)
                {
                    if (account[i] == tmp)
                    {
                        if (amount[i] >= p)
                        {
                            amount[i] -= p ;
                            cout << "withdraw " << setprecision(2) << fixed << p << ": ok" << endl ;
                        }
                        else
                        {
                            cout << "withdraw " << setprecision(2) << fixed << p << ": insufficient funds" << endl ;
                        }
                        exist = true ;
                        break ;
                    }
                }

                if (!exist)
                    cout << "withdraw " << setprecision(2) << fixed << p << ": no such account" << endl ;
            }
            else if (!strcmp(s.c_str(), "deposit"))
            {
                is >> tmp ;
                is >> dummy ;
                is >> aux ;
                tmp *= 10 ;
                tmp += aux ;

                is >> p ;

                exist = false ;

                for (int i = 0 ; i < count ; i++)
                {
                    if (account[i] == tmp)
                    {
                        amount[i] += p ;
                        cout << "deposit " << setprecision(2) << fixed << p << ": ok" << endl ;
                        exist = true ;
                        break ;
                    }
                }

                if (!exist)
                    cout << "deposit " << setprecision(2) << fixed << p << ": no such account" << endl ;
            }
            else if (!strcmp(s.c_str(), "transfer"))
            {
                is >> tmp ;
                is >> dummy ;
                is >> aux ;
                tmp *= 10 ;
                tmp += aux ;

                is >> aux ;
                is >> dummy ;
                is >> help ;
                aux *= 10 ;
                aux += help ;

                is >> p ;

                exist = false ;

                bool exist2 = false ;

                for (int i = 0 ; i < count ; i++)
                {
                    if (account[i] == tmp)
                    {
                        exist = true ;
                        break ;
                    }
                }
                
                for (int i = 0 ; i < count && exist ; i++)
                {
                    if (account[i] == aux)
                    {
                        exist2 = true ;
                        break ;
                    }
                }

                if (exist && exist2)
                {
                    exist = true ;

                    if (tmp != aux)
                    {
                        for (int i = 0 ; i < count ; i++)
                        {
                            if (account[i] == tmp)
                            {
                                if (amount[i] < p)
                                {
                                    cout << "transfer " << setprecision(2) << fixed << p << ": insufficient funds" << endl ;
                                    exist = false ;
                                }
                                else
                                    amount[i] -= p ;
                                break ;
                            }
                        }
                        
                        if (exist)
                        {
                            for (int i = 0 ; i < count ; i++)
                            {
                                if (account[i] == aux)
                                {
                                    amount[i] += p ;
                                    break ;
                                }
                            }
                        
                            if (tmp % 10 == aux % 10)
                            {
                                cout << "transfer " << setprecision(2) << fixed << p << ": ok" << endl ;
                            }
                            else
                                cout << "transfer " << setprecision(2) << fixed << p << ": interbank" << endl ;
                        }
                    }
                    else
                    {
                        cout << "transfer " << setprecision(2) << fixed << p << ": same account" << endl ;
                    }
                }
                else
                    cout << "transfer " << setprecision(2) << fixed << p << ": no such account" << endl ;
            }
        }
    }
    cout << "goodbye" << endl ;
    return 0 ;
}