#include <stdio.h>
#include <string.h>

struct konto {
	int balance;
	int exists;
};

#define KONT 10000
#define BANK 10

struct konto banky[10][10000] = {{{0,0}}};

int main(void) {
	int a;
	int k, b, k1, b1, x, y;
	char cmd[10];

	scanf("%d", &a);

	while (a) {
		for (; a; a--) {
			if (scanf("%d/%d %d.%d", &k, &b, &x, &y) != 4) {
				for(;;);
			}

			banky[b][k].exists = 1;
			banky[b][k].balance = x*100+y;
		}

		do {
			scanf("%s", cmd);

			if (!strcmp(cmd, "create")) {
				if(scanf("%d/%d", &k, &b) != 2) {
					for (;;);
				}

				if (banky[b][k].exists) {
					printf("create: already exists\n");
				} else {
					banky[b][k].exists = 1;
					banky[b][k].balance = 0;
					printf("create: ok\n");
				}
			} else if (!strcmp(cmd, "deposit")) {
				if(scanf("%d/%d %d.%d", &k, &b, &x, &y) != 4) {
					for(;;);
				}

				if (!banky[b][k].exists) {
					printf("deposit %d.%02d: no such account\n", x, y);
				} else {
					banky[b][k].balance += x*100+y;
					printf("deposit %d.%02d: ok\n", x, y);
				}
			} else if (!strcmp(cmd, "withdraw")) {
				if(scanf("%d/%d %d.%d", &k, &b, &x, &y)!=4){
					for(;;);
				}
				
				if (!banky[b][k].exists) {
					printf("withdraw %d.%02d: no such account\n", x, y);
				} else if (banky[b][k].balance < x*100+y) {
					printf("withdraw %d.%02d: insufficient funds\n", x, y);
				} else {
					banky[b][k].balance -= x*100+y;
					printf("withdraw %d.%02d: ok\n", x, y);
				}
			} else if (!strcmp(cmd, "transfer")) {
				if(scanf("%d/%d %d/%d %d.%d", &k, &b, &k1, &b1, &x, &y)!=6){
					for(;;);
				}
				if (!banky[b][k].exists || !banky[b1][k1].exists) {
					printf("transfer %d.%02d: no such account\n", x, y);
				} else if (b == b1 && k == k1) {
					printf("transfer %d.%02d: same account\n", x, y);
				} else if (banky[b][k].balance < x*100+y) {
					printf("transfer %d.%02d: insufficient funds\n", x, y);
				} else {
					banky[b][k].balance -= x*100+y;
					banky[b1][k1].balance += x*100+y;

					if (b == b1) {
						printf("transfer %d.%02d: ok\n", x, y);
					} else {
						printf("transfer %d.%02d: interbank\n", x, y);
					}
				}
			} else if (!strcmp(cmd, "end")) {
				memset(banky, 0, sizeof(banky));
				printf("end\n\n");
				break;
			}
		} while(1);

		scanf("%d", &a);
	}

	printf("goodbye\n");
	return 0;
}