#include <iostream>
#include <string>
#include <vector>
#include <cstdlib>

using namespace std;

struct ucet{
	string cisloUctu;
	char kodBanky;
	float zustatek;
};

float round(float f) {
	int i = f * 1000;
	int m = i%10;
	i = i-m;
	if (m >= 5) { return (float) (i+10) / 1000;}
	return (float) i / 1000;
}

void create(vector<ucet>& ucty){
	string cisloUctu;
	cin >> cisloUctu;
	for(unsigned i = 0; i< ucty.size(); i++){
		if(ucty[i].cisloUctu == cisloUctu){
			cout << "create: already exists" << endl;
			return;
		}
	}
	ucet u;
	u.cisloUctu = cisloUctu;
	u.kodBanky = u.cisloUctu[u.cisloUctu.length()-1];
	u.zustatek = 0;
	ucty.push_back(u);
	cout << "create: ok" << endl;	
}

void deposit(vector<ucet>& ucty){
	string cisloUctu;
	cin >> cisloUctu;
	float p;
	cin >> p;
	for(unsigned i = 0; i< ucty.size(); i++){
		if(ucty[i].cisloUctu == cisloUctu){
			ucty[i].zustatek += p;
			ucty[i].zustatek = round(ucty[i].zustatek);
			cout << "deposit ";
			printf("%.2f",p);
			cout << ": ok" << endl; 
			return;
		}
	}
	cout << "deposit ";
	printf("%.2f",p);
	cout << ": no such account" << endl; 
}


void withdraw(vector<ucet>& ucty){
	string cisloUctu;
	cin >> cisloUctu;
	float p;
	cin >> p;
	for(unsigned i = 0; i< ucty.size(); i++){
		if(ucty[i].cisloUctu == cisloUctu){
			if(p <= ucty[i].zustatek){
				ucty[i].zustatek -= p;
				ucty[i].zustatek = round(ucty[i].zustatek);
				cout << "withdraw ";
				printf("%.2f",p);
				cout << ": ok" << endl; 
			}else{
				cout << "withdraw ";
				printf("%.2f",p);
				cout << ": insufficient funds" << endl; 
			}
			return;
		}
	}
	cout << "withdraw ";
	printf("%.2f",p);
	cout << ": no such account" << endl; 
}

void transfer(vector<ucet>& ucty){
	string src, dest;
	cin >> src;
	cin >> dest;
	ucet *srcUcet = NULL;
	ucet *destUcet = NULL;
	float p;
	cin >> p;
	if(src == dest){
		cout << "transfer ";
		printf("%.2f",p);
		cout << ": same account" << endl;
	}else{
		for(unsigned i = 0; i< ucty.size(); i++){
			if(ucty[i].cisloUctu == src){
				srcUcet = &ucty[i];
			}
			if(ucty[i].cisloUctu == dest){
				destUcet = &ucty[i];
			}
		}
		if(!srcUcet || !destUcet){
			cout << "transfer ";
			printf("%.2f",p);
			cout << ": no such account" << endl;
			return;
		} 
		if(srcUcet->zustatek < p){
			cout << "transfer ";
			printf("%.2f",p);
			cout << ": insufficient funds" << endl;
			return;
		}
		srcUcet->zustatek -= p;
		srcUcet->zustatek = round(srcUcet->zustatek);
		destUcet->zustatek += p;
		destUcet->zustatek = round (destUcet->zustatek);
		if(srcUcet->kodBanky == destUcet->kodBanky){
			cout << "transfer ";
			printf("%.2f",p);
			cout << ": ok" << endl;
		}else{
			cout << "transfer ";
			printf("%.2f",p);
			cout << ": interbank" << endl;
		}
		
	}
}


int main () {
	while(true){
		// nacitani uctu
		int pocetUctu;
		
		string operace;
		vector<ucet> ucty;
		// nacteni uctu
		cin >> pocetUctu;
		if( pocetUctu == 0 ) break;
		for(unsigned i = 0; i < pocetUctu; i++){
			ucet u;
			cin >> u.cisloUctu;
			u.kodBanky = u.cisloUctu[u.cisloUctu.length()-1];
			cin >> u.zustatek;
			ucty.push_back(u);
		}
		
		// operace
		
		while(true){
			cin >> operace;
			if(operace == "end") break;
			if(operace == "create"){
				create(ucty);
			}else if(operace == "deposit"){
				deposit(ucty);
			}else if(operace == "withdraw"){
				withdraw(ucty);
			}else if(operace == "transfer"){
				transfer(ucty);
			}
			/*
			cout << "zustatek ";
			printf("%f",ucty[0].zustatek);
			cout << endl;*/
		}
		
		cout << "end" << endl;
		cout << endl;
	
	}	
	
	cout << "goodbye" << endl;

	return 0;
}