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


struct ucet
{
  bool aktivni;
  float castka;
};

ucet ucty[500000];

bool act(int i)
{
 return ucty[i].aktivni;
}

int main()
{
  int pocet;
  char line[5200];
    int ucet;
    int uc2;
    float m;
    int uc3;
#define SL uc3 = ucet*10+uc2;
#define NSA printf("no such account\n");

   while(scanf("%d", &pocet)==1)
   {
    memset(ucty, 0, sizeof(ucty));
    if (pocet == 0)
    {
      break;
    }
//nacist konta
    for(int c = 0; c<pocet; ++c)   
    {
     if(scanf("%d/%d %f", &ucet, &uc2, &m)==3) // tady byl newline
     {
      SL;
      ucty[uc3].aktivni = true;
      ucty[uc3].castka += m;
     }
    }
    while((fgets(line, 5000, stdin)) && (strcmp(line, "end")))
    {
      if (sscanf(line, "withdraw %d/%d %f", &ucet, &uc2, &m ) == 3 )
      {
       	SL;
	printf("withdraw %.2f: ", m);
	if (ucty[uc3].aktivni)
	{
      		if(( ucty[uc3].castka >= m))
	      	{
	        	ucty[uc3].castka-=m;
			printf("ok\n");	      
	      	}                         
	      	else 
	      	{
	      	 printf( "insufficient funds\n");
	      	}
	}
	else
	{
	   NSA;
	}
	continue;
      }

      if (sscanf(line, "deposit %d/%d %f", &ucet, &uc2, &m ) == 3 )
      {
      SL;
        
	printf("deposit %.2f: ", m);
      	if((ucty[uc3].aktivni))
	{
	 ucty[uc3].castka += m;
	 printf("ok\n");	
	}
	else
	{
	printf("no such account\n");
	}	      
	continue;
      }

      int du1, du2, du3;

      if (sscanf(line, "transfer %d/%d %d/%d %f", &ucet, &uc2, &du1, &du2, &m ) == 5 )
      {
        SL;
	du3 = du1*10+du2;
	printf("transfer %.2f: ", m);
	if(!(act(du3) && act(uc3)))
	{
	NSA;
	continue;	
	}
	if(du3 == uc3)
	{
	  printf("same account\n");
	  continue;
	}      
	else
	if(ucty[uc3].castka < m)
	{
		printf("insufficient funds\n");	
		continue;
	}
	
	 ucty[uc3].castka -= m;
	 ucty[du3].castka += m;
	if(uc2 != du2)
	{
	 printf("interbank\n");
	}
	else
	{
	printf("ok\n");
	}
	continue;
      }

      if (sscanf(line, "create %d/%d", &ucet, &uc2 ) == 2 )
      {
      SL;
      printf("create: ");
       if(act(uc3))
       {
       printf("already exists\n");              
       }      
       else
       {
       ucty[uc3].aktivni = true;
       printf("ok\n");
       }
       continue;
      }
   
    }
    printf("end\n\n");
    fgets(line, 5000, stdin);//one empty line

   }
   printf("goodbye\n");
  return 0;
}