#include <cstdio>
#include <map>
#include <string>

using namespace std;

double p[100000];

int main() {
	int u, uc1, uc2, ut1, ut2;
	char pr[10];
	double h;
	while(scanf("%d", &u) != EOF) {
		if (!u) {
			printf("goodbye\n");
			return 0;
		}
		for (int i = 0; i < 100000; i++) {
			p[i] = -1;
		}
		for (int i = 0; i < u; i++) {
			scanf("%d/%d %lf", &uc1, &uc2, &h);
			p[uc1*10+uc2] = h;
		}
		scanf("%s", pr);
		while(pr[0] != 'e') {
			if (pr[0] == 'w') {
				scanf("%d/%d %lf", &uc1, &uc2, &h);
				printf("withdraw %.2lf: ", h);
				if (p[uc1*10+uc2] == -1) {
					printf("no such account\n");
				} else if (p[uc1*10+uc2] < h) {
					printf("insufficient funds\n");
				} else {
					p[uc1*10+uc2] -= h;
					printf("ok\n");
				}

			} else if (pr[0] == 'c') {
				scanf("%d/%d %lf", &uc1, &uc2, &h);
				printf("create: ");
				if (p[uc1*10+uc2] != -1) {
					printf("already exists\n");
				} else {
					p[uc1*10+uc2] = 0;
					printf("ok");
				}

			} else if (pr[0] == 'd') {
				scanf("%d/%d %lf", &uc1, &uc2, &h);
				printf("deposit %.2lf: ", h);
				if (p[uc1*10+uc2] == -1) {
					printf("no such account\n");
				} else {
					p[uc1*10+uc2] += h;
					printf("ok\n");
				}

			} else if (pr[0] == 't') {
				scanf("%d/%d %d/%d %lf", &uc1, &uc2, &ut1, &ut2, &h);
				printf("transfer %.2lf: ", h);
				if (p[uc1*10+uc2] == -1) {
					printf("no such account\n");
				} else if (p[ut1*10+ut2] == -1) {
					printf("no such account\n");
				} else if (p[uc1*10+uc2] < h) {
					printf("insufficient funds\n");
				} else {
					p[ut1*10+ut2] -= h;
					p[uc1*10+uc2] += h;
					if (uc2 == ut2) {
						printf("ok\n");
					} else { 
						printf("interbank\n");
					}
				}
			}
			scanf("%s",pr);
		}
		printf("end\n");
	}

	return 0;
}