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

#define tp float

char acc[110][100];
int am[110];

int count;

int fnd(char *c) {
	int t;
	for (t=0;t < count; t++) {
		if (!strcmp(acc[t], c))
			return t;
	}
	return -1;
}

int main() {
	
	for(;;) {
		scanf("%i\n", &count);
		if (count == 0) {
			printf("goodbye\n");
			return 0;
		}
		int t;
		for (t=0; t < count; t++) {
			float f;
			scanf("%s %f", acc[t], &f);
			am[t] = f * 100;
		}

		char buf[10000];
		char buf2[10000];
		tp dd; int d;
		for(;;) {
			scanf("%s", buf);
			if (!strcmp(buf, "withdraw")) {
				scanf("%s %g\n", buf, &dd);
				d = dd * 100;
				int a = fnd(buf);
				if (a != -1) {
					if (am[a] >= d) {
						am[a] -= d;
						printf("withdraw %.2f: ok\n", dd);
					} else {
						printf("withdraw: %.2f: insufficient funds\n", dd);
					}
				} else {
					printf("withdraw: %.2f: no such account\n", dd);
				}
			}
			if (!strcmp(buf,"deposit")) {
				scanf("%s %g\n", buf, &dd);
				d = dd * 100;
				int a = fnd(buf);
				if (a != -1) {
					am[a] += d;
					printf("deposit: %.2f: ok\n", dd);
				} else {
					printf("deposit: %.2f: no such account\n", dd);
				}
			}
			if (!strcmp(buf, "create")) {
				scanf("%s\n", buf);
				int a = fnd(buf);
				if (a != -1) {
					printf("create: already exists\n");
				} else {
					printf("create: ok\n");
					strcpy(acc[count], buf);
					am[count] = 0.0;
					count++;
				}
			
			}

			if (!strcmp(buf,"end")) {
				printf("end\n\n");
				break;
			}
			if (!strcmp(buf, "transfer")) {
				scanf("%s %s %f\n", buf, buf2, &dd);
				d = dd * 100;
				int a = fnd(buf);
				int b = fnd(buf2);
				if (a == -1 || b == -1) {
					printf("transfer %.2f: no such account\n", dd);
				} else {
					if (a == b) {
						printf("transfer %.2f: same account\n", dd);
					} else {
						if (am[a] < d)  {
							printf("transfer %.2f: insufficient funds\n", dd);
						} else {
							am[a] -= d;
							am[b] += d;
							if (buf[5] == buf2[5]) {
								printf("transfer %.2f: interbank\n", dd);
							} else {
								printf("transfer %.2f: ok\n", dd);
							}
						}
					}
				}
			
			}

		}


	}

	return 0;
}