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

typedef struct pole
{
	int num;
	int bank;
	double sum;
} ucet;

int main()
{
	ucet ucty[150];
	char aleluja[50];
	char buffer[100];
	char prik[50];
	int pocet,i;
	int uc, uc1, j;
	int ba, ba1, nosuch;
	double su;
	
	while(1)
	{
		gets(buffer);
		sscanf(buffer,"%d\n",&pocet);
		if(pocet==0)break;		
		for(i=0;i<pocet;i++)
		{
			gets(buffer);
			sscanf(buffer,"%d/%d %lf\n",&ucty[i].num,&ucty[i].bank,&ucty[i].sum);
		}
		while(1)
		{
			gets(buffer);
			sscanf(buffer,"%s",prik);
			if(strcmp(buffer,"end")!=0)
			{
				printf("%s",prik);
				
			}
			if(strcmp(buffer,"end")==0)
			{
				printf("end\n\n");
				gets(buffer);
				break;
			}
			




		else if(strcmp(prik,"withdraw")==0)
{
	sscanf(buffer,"%s %d/%d %lf\n", aleluja, &uc, &ba, &su);
printf(" %.2lf: ",su);
	nosuch=0;
	for(i=0;i<pocet;i++)
	{
		
		if(ucty[i].num == uc && ucty[i].bank == ba)
		{
			nosuch=1;
			if(ucty[i].sum <= su)printf("insufficient funds\n");
			else
			{ucty[i].sum -= su;printf("ok\n");}
			continue;
		}
	}
	if(nosuch==0)printf("no such account\n");
}
		else if(strcmp(prik,"deposit")==0)
{
	sscanf(buffer,"%s %d/%d %lf\n", aleluja, &uc, &ba, &su);
printf(" %.2lf: ",su);
nosuch = 0;
	for(i=0;i<pocet;i++)
	{
		if(ucty[i].num == uc && ucty[i].bank == ba)
		{
			nosuch=1;
			ucty[i].sum += su;
			printf("ok\n");
			continue;
		}
	}
	if(nosuch==0)printf("no such account\n");
}
		else if(strcmp(prik,"create")==0)
{
	sscanf(buffer,"%s %d/%d\n", aleluja, &uc, &ba);
	for(i=0;i<pocet;i++)
	{
		if(ucty[i].num == uc && ucty[i].bank == ba)
		{
			printf(": already exists\n");
			break;
		}
		if(i==pocet-1)
		{
			ucty[pocet].num = uc;
			ucty[pocet].bank = ba;
			ucty[pocet].sum = 0;
			pocet++;
			printf(": ok\n");
			break;
		}
	}
	continue;
}
		else if(strcmp(prik,"transfer")==0)
{
	sscanf(buffer,"%s %d/%d %d/%d %lf\n", aleluja, &uc, &ba, &uc1, &ba1, &su);
	printf(" %.2lf: ",su);
	if(uc==uc1 && ba==ba1)
	{
		printf("same account\n");
		continue;
	}
	nosuch = 0;
	for(i=0;i<pocet;i++)
	{
		if(ucty[i].num == uc && ucty[i].bank == ba)
		{
				for(j=0;j<pocet;j++)
				{
					if(i==j)continue;
					if(ucty[j].num == uc1 && ucty[j].bank == ba1)
					{
						nosuch=1;
						if(ucty[i].sum <= su){printf("insufficient funds\n");break;}
						else
						{
							ucty[i].sum -= su;
							ucty[j].sum += su;
							if(ba==ba1)printf("ok\n");
							else printf("interbank\n");
							break;
						}
					}
					if(j==pocet-1){break;}
				}
		}
		if(i==pocet-1){break;}
	}
	if(nosuch==0)printf("no such account\n");
}
			
		}
	}
	printf("goodbye\n");
	return 0;
}