#include <stdio.h>

typedef struct ucet {
	int cislo;
	int banka;
	double peniaze;
} UCET;

void deposit (UCET ucty[], int pocet);
void withdraw (UCET ucty[], int pocet);
void transfer (UCET ucty[], int pocet);
void create(UCET ucty[], int *pocet);

int main(void) {
	UCET ucty[120];
	int pocet, i;
	char cislo[10];
	char prikaz[12];
	
	while (1) {
		scanf(" %d", &pocet);
		if (pocet == 0) {
			printf("goodbye\n");
			break;		
		}
		else {
			for (i = 0; i < pocet; i++) {
				scanf(" %s %lf", cislo, &(ucty[i].peniaze));
				sscanf(cislo, "%d/%d", &(ucty[i].cislo), &(ucty[i].banka));
			}
			while (1) {
				scanf(" %s", prikaz);
				if (prikaz[0] == 'e') {
					printf("end\n");
					printf("\n");
					break;				
				}
				else
					switch (prikaz[0]) {
						case 'c':
							create(ucty, &pocet);
							break;
						case 'd':
							deposit(ucty, pocet);
							break;
						case 'w':
							withdraw(ucty, pocet);
							break;
						case 't':
							transfer(ucty, pocet);
							break;
						default:
							break;			
					}
			}
		}
	}
	return 0;
}

void deposit (UCET ucty[], int pocet) {
	char cislo[10];
	double kolko;
	int ucet, banka, i;
	scanf(" %s %lf", cislo, &kolko);
	sscanf(cislo, " %d/%d", &ucet, &banka);
	for (i = 0; i < pocet; i++)
		if (ucty[i].cislo == ucet && ucty[i].banka == banka)
			break;
	if (i == pocet)
		printf("deposit %.2lf: no such account\n", kolko);
	else {
		ucty[i].peniaze = ucty[i].peniaze + kolko;
		printf("deposit %.2lf: ok\n", kolko);
	}
}

void withdraw (UCET ucty[], int pocet) {
	char cislo[10];
	double kolko;
	int ucet, banka, i;
	scanf(" %s %lf", cislo, &kolko);
	sscanf(cislo, " %d/%d", &ucet, &banka);
	for (i = 0; i < pocet; i++)
		if (ucty[i].cislo == ucet && ucty[i].banka == banka)
			break;
	if (i == pocet)
		printf("withdraw %.2lf: no such account\n", kolko);
	else {
		if (ucty[i].peniaze < kolko)
			printf("withdraw %.2lf: insufficient funds\n", kolko);
		else {
			ucty[i].peniaze = ucty[i].peniaze - kolko;
			printf("withdraw %.2lf: ok\n", kolko);
		}
	}
}

void transfer (UCET ucty[], int pocet) {
	char cislo[10];
	char cislo2[10];
	double kolko;
	int ucet, banka, ucet2, banka2, i, j;
	scanf(" %s %s %lf", cislo, cislo2, &kolko);
	sscanf(cislo, " %d/%d", &ucet, &banka);
	sscanf(cislo2, "%d/%d", &ucet2, &banka2);
	for (i = 0; i < pocet; i++)
		if (ucty[i].cislo == ucet && ucty[i].banka == banka)
			break;
	for (j = 0; j < pocet; j++)
		if (ucty[j].cislo == ucet2 && ucty[j].banka == banka2)
			break;
	if (i == pocet || j == pocet)
		printf("transfer %.2lf: no such account\n", kolko);
	else {
		if (ucet == ucet2 && banka == banka2)
			printf("transfer %.2lf: same account\n", kolko);
		else {
			if (ucty[i].peniaze < kolko)
				printf("transfer %.2lf: insufficient funds\n", kolko);
			else {
				ucty[i].peniaze = ucty[i].peniaze - kolko;
				ucty[j].peniaze = ucty[j].peniaze + kolko;
				if (banka == banka2)
					printf("transfer %.2lf: ok\n", kolko);
				else
					printf("transfer %.2lf: interbank\n", kolko);
			}
		}
	}
}

void create(UCET ucty[], int *pocet) {
	int banka, ucet, i; 
	
	scanf(" %d/%d", &ucet, &banka);
	
	for (i = 0; i < *pocet; i++)
		if (ucty[i].cislo == ucet && ucty[i].banka == banka)
			break;
	if (i == *pocet) {
		printf("create: ok\n");
		ucty[i].cislo = ucet;
		ucty[i].banka = banka;
		ucty[i].peniaze = 0.00;
		(*pocet)++;
	}
	else
		printf("create: already exists\n"); 
}