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

int a[1000000];
char e[1000000];
/*int as[1000000];*/

int reada(void)
{
  int i,j;
  scanf("%d/%d", &i, &j);
  i= i*10+j;
  return i;
}

int reads(void)
{
  int i,j;
  scanf("%d.%d", &i, &j);
  i= i*100+j;
  return i;
}

void writes(int s)
{ printf("%d.%02d", s/100, s%100);
}


int main(void)
{
  int i,k,j,n;


for (;;)
{
  
  scanf("%d", &n);
  
  if (n==0) 
  { printf("goodbye\n"); return 0;
  }
  
  for (i=0; i<n; i++)
  { int A = reada();
    int S = reads();
    e[A]=1;
    a[A]=S;
/*    as[i] = A;*/
  }
  
  int A,B,S;
  for(;;)
  { char s[128];
    scanf("%s", s);
    switch(s[0])
    { case 'e': goto end;
      case 'c':
        A = reada();
	if (e[A]) printf("create: already exists");
	else e[A]=1,a[A]=0,/*as[n++]=A,*/ printf("create: ok");
	break;
      case 'd':
        A = reada();
	S = reads();
	printf("deposit "),writes(S),printf(": ");
	if (!e[A]) printf("no such account");
	else printf("ok"), a[A]+=S;
	break;
      case 'w':
        A = reada();
	S = reads();
	printf("withdraw "),writes(S),printf(": ");
	if (!e[A]) printf("no such account");
	else if (a[A]<S) printf("insufficient funds");
	else printf("ok"), a[A]-=S;
	break;
      case 't':
        A = reada();
        B = reada();
	S = reads();
	printf("transfer "),writes(S),printf(": ");
	if (!e[A] || !e[B]) printf("no such account");
	else if (A==B) printf("same account");
	else if (a[A]<S) printf("insufficient funds");
	else printf(A%10==B%10 ? "ok" : "interbank"), a[A]-=S, a[B]+=S;
	break;
/*      default: printf("*");*/
    }
    printf("\n");
/*
  for (i=0; i<n; i++) 
  { printf("[%d|%d]", as[i], a[as[i]]);
  }
*/
  }
  end:
  printf("end\n\n");
  
  memset(e, 0, 100000); 
/*
  for (i=0; i<n; i++) 
  { e[as[i]] = 0;
  }
*/  

}
}