#include <iostream>
#include <sstream>
#include <string>
#include <cstdlib>
#include <cstdio>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <cmath>
#include <algorithm>
#include <list>
#include <stack>
#include<iomanip>
#define max(x,y) ((x) > (y) ? (x) : (y))
#define min(x,y) ((x) < (y) ? (x) : (y))

using namespace std;

int main(void)
{
    map<string,double>bank;
    string number;
    int accounts;
    cin>>accounts;
    while(accounts)
    {
        for(int i=0;i<accounts;i++)
        {
            double bilance;
            cin>>number>>bilance;
            bank[number]=bilance;
        }
        string command;
        cin >> command;
        do{
            if(command=="create")
                {
                    cin>>number;
                    if(bank.find(number)==bank.end())
                    {           
                        bank[number]=0;
                        cout<<"create: ok"<<endl;
                    }
                    else
                    {
                        cout<<"create: already exists"<<endl;
                    }
                }
                else if(command=="deposit")
                {
                    double add;
                    cin>>number>>add;
                    if(bank.find(number)!=bank.end())
                    {
                        bank[number]=bank[number]+add;
                        cout<<"deposit ";printf("%.2f", add);cout<<": ok"<<endl;
                    }
                    else {
                        cout<<"deposit "; printf("%.2f", add);cout<<": no such account"<<endl;
                    }
                }
                else if(command=="withdraw")
                {
                    double add;
                    cin>>number>>add;
                    if(bank.find(number)!=bank.end())
                    {
                        if(bank[number]>=add-0.001)
                        {
                        bank[number]=bank[number]-add;
                        cout<<"withdraw "; printf("%.2f", add); cout<<": ok"<<endl;
                        }
                        else
                        {
                        cout<<"withdraw "; printf("%.2f", add); cout<<": insufficient funds"<<endl;
                        }
                    }
                    else {
                        cout<<"withdraw "; printf("%.2f", add); cout<<": no such account"<<endl;
                    }
                }
                else if(command=="transfer")
                {
                    double add;
                    string number2;
                    cin>>number>>number2>>add;
                    if((bank.find(number)!=bank.end())&&(bank.find(number2)!=bank.end()))
                    {
                        if(number==number2)
                        {
                            cout<<"transfer "; printf("%.2f", add); cout<<": same account"<<endl;
                        }
                        else if(bank[number]>=add-0.001)
                        {
                            bank[number]=bank[number]-add;
                            bank[number]=bank[number2]+add;
                            int pos1=number.find("/");
                            int pos2=number2.find("/");
                            
                            cout<<"transfer "; printf("%.2f", add); cout<<(number.substr(pos1) == number2.substr(pos2) ? ": ok" : ": interbank")<<endl;
                        }
                        else
                        {
                            cout<<"transfer "; printf("%.2f", add); cout<<": insufficient funds"<<endl;
                        }
                    }
                    else
                    {
                        cout<<"transfer "; printf("%.2f", add); cout<<": no such account"<<endl;
                    }
                }
                
                cin >> command;
        
        }while(command!="end");
        cout << "end" << endl << endl;
        cin>>accounts;
    }
    
    cout << "goodbye" << endl;
    
    return 0;
}