#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <stdlib.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 stoi(char *s) {
	char *z = strdup(s);
	int l = strlen(s);
	z[l - 3] = z[ l - 2];
	z[l - 2] = z[ l - 1];
	z[l - 1] = z[ l - 0];
	int i = atoi(z);
	free(z);
	return i;
}

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

		char buf[10000];
		char buf2[10000];
		char dd[10000]; int d;
		for(;;) {
			scanf("%s", buf);
			if (!strcmp(buf, "withdraw")) {
				scanf("%s %s\n", buf, dd);
				d = stoi(dd);
				int a = fnd(buf);
				if (a != -1) {
					if (am[a] >= d) {
						am[a] -= d;
						printf("withdraw %s: ok\n", dd);
					} else {
						printf("withdraw %s: insufficient funds\n", dd);
					}
				} else {
					printf("withdraw %s: no such account\n", dd);
				}
			}
			if (!strcmp(buf,"deposit")) {
				scanf("%s %s\n", buf, dd);
				d = stoi(dd);
				int a = fnd(buf);
				if (a != -1) {
					am[a] += d;
					printf("deposit %s: ok\n", dd);
				} else {
					printf("deposit %s: 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;
					count++;
				}
			
			}

			if (!strcmp(buf,"end")) {
				int t;
/*				for (t=0;t < count;t++) {
					printf("%s %i\n", acc[t], am[t]);
				}*/
				printf("end\n\n");
				break;
			}
			if (!strcmp(buf, "transfer")) {
				scanf("%s %s %s\n", buf, buf2, dd);
				d = stoi(dd);
				int a = fnd(buf);
				int b = fnd(buf2);
				if (a == -1 || b == -1) {
					printf("transfer %s: no such account\n", dd);
				} else {
					if (a == b) {
						printf("transfer %s: same account\n", dd);
					} else {
						if (am[a] < d)  {
							printf("transfer %s: insufficient funds\n", dd);
						} else {
							am[a] -= d;
							am[b] += d;
							if (buf[5] == buf2[5]) {
								printf("transfer %s: interbank\n", dd);
							} else {
								printf("transfer %s: ok\n", dd);
							}
						}
					}
				}
			
			}

		}


	}

	return 0;
}