import java.io.*;

class banking {

static String a;
static int numacc;
static String data[];
static String data_acc[];
static float accounts[][];
static float ammount;
static int bank_code;
static int acc_code;
static String scnd_data_acc[];
static int scnd_bank_code;
static int scnd_acc_code;


	public static void main(String args[]){
		try{
	 	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

                	while(!(a = br.readLine()).equals("0")) {

				accounts = new float[10][10000];
				
				numacc = Integer.parseInt(a);
				
			///////nacteni uctu

				for(int i = 0; i < numacc; i++) {

					a = br.readLine();
					data = a.split(" ");
					ammount = Float.parseFloat(data[1]);

					data_acc = data[0].split("/");
					bank_code = Integer.parseInt(data_acc[1]);
					acc_code = Integer.parseInt(data_acc[0]);

					accounts[bank_code][acc_code] = ammount + 1;

				}

				
			//////cteni operaci

				while(!(a = br.readLine()).equals("end")){

				data = a.split(" ");

				if(data[0].equals("create")){
					
					data_acc = data[1].split("/");
					bank_code = Integer.parseInt(data_acc[1]);
					acc_code = Integer.parseInt(data_acc[0]);

					if(accounts[bank_code][acc_code] > 0) System.out.println("create: already exists");else {accounts[bank_code][acc_code] = 1; 
		System.out.println("create: ok");
				}

				}
				if(data[0].equals("deposit")){
			
				data_acc = data[1].split("/");
				bank_code = Integer.parseInt(data_acc[1]);
				acc_code = Integer.parseInt(data_acc[0]);

					if(accounts[bank_code][acc_code] > 0) {
						 accounts[bank_code][acc_code] += Float.parseFloat(data[2]);
						 System.out.println("deposit " + data[2] + ": ok");
					}
					else System.out.println("deposit " + data[2] + ": no such account");


				}
				if(data[0].equals("withdraw")){

				data_acc = data[1].split("/");
				bank_code = Integer.parseInt(data_acc[1]);
				acc_code = Integer.parseInt(data_acc[0]);

					if(accounts[bank_code][acc_code] > 0) {
						if((accounts[bank_code][acc_code]-1) > Float.parseFloat(data[2])){
							accounts[bank_code][acc_code] -= Float.parseFloat(data[2]);
							System.out.println("withdraw " + data[2] + ": ok");
						}
						else System.out.println("withdraw " + data[2] + ": insufficient funds");
					}
					else System.out.println("withdraw " + data[2] + ": no such account");
					
				}
				if(data[0].equals("transfer")){
					data_acc = data[1].split("/");
					bank_code = Integer.parseInt(data_acc[1]);
					acc_code = Integer.parseInt(data_acc[0]);

					scnd_data_acc = data[2].split("/");
					scnd_bank_code = Integer.parseInt(scnd_data_acc[1]);
					scnd_acc_code = Integer.parseInt(scnd_data_acc[0]);
                                        if(accounts[bank_code][acc_code] > 0){ 
                                        if(accounts[scnd_bank_code][scnd_acc_code] > 0) {
						if(!data[1].equals(data[2])) {
							if((accounts[bank_code][acc_code]-1) > Float.parseFloat(data[3])){
								accounts[bank_code][acc_code] -= Float.parseFloat(data[3]);
								accounts[scnd_bank_code][scnd_acc_code] += Float.parseFloat(data[3]);
								if(bank_code != scnd_bank_code) System.out.println("transfer " + data[3] + ": interbank");
								else System.out.println("transfer " + data[3] + ": ok");
							}
							else System.out.println("transfer " + data[3] + ": insufficient funds");
						}
						else System.out.println("transfer " + data[3] + ": same account");
				
					}
					else System.out.println("transfer " + data[3] + ": no such account");
					}
					else System.out.println("transfer " + data[3] + ": no such account");
				}

					if((in = br.readLine()) == null) continue;
				else break;

				}
			
			}
			

			System.out.println("goodbye");


		}
		catch(IOException e){}         
	}




}