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

using namespace std;

double p[1100];

map<int, int> ucty;

int main() {
	int u, uc1, uc2, ut1, ut2;
	int in;
	char pr[100];
	double h;
	while(scanf("%d", &u) != EOF) {
		in = 1;
		ucty.clear();

		if (!u) {
			printf("goodbye\n");
			return 0;
		}
		for (int i = 0; i < 1100; i++) {
			p[i] = -1;
		}
		for (int i = 0; i < u; i++) {
			scanf("%d/%d %lf", &uc1, &uc2, &h);
			ucty[uc1*10+uc2] = in;
			p[in] = h;
			p[ucty[uc1*10+uc2]] = round(p[ucty[uc1*10+uc2]]*100)/double    (100);
			in++;
		}

		scanf("%s", pr);
		while(pr[0] != 'e') {
			if (pr[0] == 'w') {
				scanf("%d/%d %lf", &uc1, &uc2, &h);
				printf("withdraw %.2lf: ", h );
				if (p[ucty[uc1*10+uc2]] == -1) {
					printf("no such account\n");
				} else if (p[ucty[uc1*10+uc2]] < h) {
					printf("insufficient funds\n");
				} else {
					p[ucty[uc1*10+uc2]] -= h;
					p[ucty[uc1*10+uc2]] = round(p[ucty[uc1*10+uc2]]*100)/double(100);
					printf("ok\n");
				}

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

			} else if (pr[0] == 'd') {
				scanf("%d/%d %lf", &uc1, &uc2, &h);
				printf("deposit %.2lf: ", h);
				if (p[ucty[uc1*10+uc2]] == -1) {
					printf("no such account\n");
				} else {
					p[ucty[uc1*10+uc2]] += h;
			p[ucty[uc1*10+uc2]] = round(p[ucty[uc1*10+uc2]]*100)/double    (100);
					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[ucty[uc1*10+uc2]] == -1) {
					printf("no such account\n");
				} else if (p[ucty[ut1*10+ut2]] == -1) {
					printf("no such account\n");
				} else if(uc2 == ut2 && uc1 == ut1) {
					printf("same account\n");
				} else if (p[ucty[uc1*10+uc2]] < h) {
					printf("insufficient funds\n");
				} else {
					p[ucty[ut1*10+ut2]] += h;
					p[ucty[uc1*10+uc2]] -= h;
			p[ucty[uc1*10+uc2]] = round(p[ucty[uc1*10+uc2]]*100)/double    (100);
			p[ucty[ut1*10+ut2]] = round(p[ucty[ut1*10+ut2]]*100)/double    (100);
					if (uc2 == ut2) {
						printf("ok\n");
					} else { 
						printf("interbank\n");
					}
				}
			}
			scanf("%s",pr);
		}
		printf("end\n\n");
	}

	return 0;
}