#include <cstdio>
#include <cstdlib>
#include <cstring>

using namespace std;

#define EPS  0.00001
#define MAX_ACCOUNT 10001
#define MAX_BANK       11


struct account
{
	account()
	{
		money = 0;
		run = 0;
	}

	double money;
	int    run;
};

account accounts[MAX_ACCOUNT][MAX_BANK];

int R = 0;

void load_balance(int n)
{
	for (int i = 0; i < n; i++)
	{
		int acc, bnk;
		double money;
		scanf("%d/%d %lf", &acc, &bnk, &money);
		accounts[acc][bnk].money = money;
		accounts[acc][bnk].run   = R;
	}
}

void process_operations()
{
	char cmd[20];
	
	int acc = 0, bnk = 0;
	int acc2 = 0, bnk2 = 0;
	double money = 0;

	while(true)
	{
		scanf("%s", cmd);
		switch(cmd[0])
		{
			case 'e':
				printf("end\n\n");
				return;
			case 'c':
				scanf("%d/%d", &acc, &bnk);
				if ( accounts[acc][bnk].run == R )
				{
					printf("create: already exists\n");
				}
				else
				{
					accounts[acc][bnk].money = 0;
					accounts[acc][bnk].run   = R;
					printf("create: ok\n");
				}
				break;
			case 'd':
				scanf("%d/%d %lf", &acc, &bnk, &money);
				printf("%s %.02lf: ", cmd, money);
				if ( accounts[acc][bnk].run != R )
				{
					printf("no such account\n");
				}
				else
				{
					accounts[acc][bnk].money += money;
					printf("ok\n");
				}
				break;
	
			case 'w':
				scanf("%d/%d %lf", &acc, &bnk, &money);
				printf("%s %.02lf: ", cmd, money);
				if ( accounts[acc][bnk].run != R )
				{
					printf("no such account\n");
					break;
				}

				if (accounts[acc][bnk].money < money-EPS)
				{
					printf("insufficient funds\n");
					break;
				}

				accounts[acc][bnk].money -= money;
				printf("ok\n");
				break;

			case 't':
				scanf("%d/%d  %d/%d %lf", &acc, &bnk, &acc2, &bnk2,  &money);
				printf("%s %.02lf: ", cmd, money);
				if ( accounts[acc][bnk].run != R )
				{
					printf("no such account\n");
					break;
				}
				if ( accounts[acc2][bnk2].run != R )
				{
					printf("no such account\n");
					break;
				}

				
				if ( acc == acc2 && bnk == bnk2 ) 
				{
					printf("same account\n");
					break;
				}


				if (accounts[acc][bnk].money < money-EPS)
				{
					printf("insufficient funds\n");
					break;
				}

				accounts[acc][bnk].money -= money;
				accounts[acc][bnk].money += money;

				if (bnk == bnk2) printf("ok\n");
				else printf("interbank\n");
				break;
		}
	}
}

int main(int argc, char *argv[])
{
	while(true)
	{
		R++;

		int n;
		scanf("%d", &n);
		if (n == 0) break;

		load_balance(n);

		process_operations();
	}


	printf("goodbye\n");

	return 0;
}