#include <stdio.h>
#include <map>
#include <string>
//#include <algorithm>

using namespace std;

int ucty[100000];
int N;
char command;
int a,b, a2, b2, c,d;
bool end;

int main()
{
	while (1)
	{
		scanf(" %d", &N);
		if (N == 0)
			break;
		for (int i = 0; i < 100000; i++)
			ucty[i] = -1;
		for (int i = 0; i < N; i++)
		{
			scanf("%d/%d %d.%d\n", &a, &b, &c, &d);
			ucty[a*10+b] = c*100+d;
		}
		end = false;
		while (end == false)
		{
			scanf("%c", &command);
			switch(command)
			{
			case 'c':
				scanf("reate %d/%d", &a, &b);
				if (ucty[a*10+b] != -1)
					printf("create: already exists\n");
				else
				{
					printf("create: ok\n");
					ucty[a*10+b] = 0;
				}
				break;
			case 'd':
				scanf("eposit %d/%d %d.%d", &a, &b, &c, &d);
				if (ucty[a*10+b] == -1)
					printf("deposit %d.%02d: no such account\n", c, d);
				else
				{
					printf("deposit %d.%02d: ok\n", c, d);
					ucty[a*10+b] += 100*c+d;
				}
				break;
			case 'w':
				scanf("ithdraw %d/%d %d.%d", &a, &b, &c, &d);
				if (ucty[a*10+b] == -1)
					printf("withdraw %d.%02d: no such account\n", c, d);
				else
				{
					if (ucty[a*10+b] < 100*c+d)
						printf("withdraw %d.%02d: insufficient funds\n", c, d);
					else
					{
						printf("withdraw %d.%02d: ok\n", c, d);
						ucty[a*10+b] -= 100*c+d;
					}
				}
				break;
			case 't':
				scanf("ransfer %d/%d %d/%d %d.%d", &a, &b, &a2, &b2, &c, &d);
				if (ucty[a*10+b] == -1 || ucty[a2*10+b2] == -1)
					printf("transfer %d.%02d: no such account\n", c, d);
				else if (a*10+b == a2*10+b2)
					printf("transfer %d.%02d: same account\n", c, d);
				else
				{
					if (ucty[a*10+b] < 100*c+d)
						printf("transfer %d.%02d: insufficient funds\n", c, d);
					else
					{
						if (b == b2)
							printf("transfer %d.%02d: ok\n", c, d);
						else
							printf("transfer %d.%02d: interbank\n", c, d);
						ucty[a*10+b] -= 100*c+d;
						ucty[a2*10+b2] += 100*c+d;
					}
				}
				break;
			case 'e':
				scanf("nd");
				printf("end\n\n");
				end = true;
				break;
			}
		}
	}
	printf("goodbye\n");
	return 0;
}