#include <stdio.h>

#define END "end"
#define ZERO "0"

#define TRANSFER "transfer"
#define DEPOSIT "deposit"
#define WITHDRAW "withdraw"
#define CREATE "create"

#define OK "ok"
#define EXISTS "already exists"
#define INSUF "insufficient funds"
#define INTERBANK "interbank"
#define SAME "same account"
#define NOACC "no such account"


typedef char STRING[255];

typedef struct _SU {
  char c[10];
  double z;
} SU;


int A, i, j, index, index2;
SU U[1100];
double s;
STRING pc1, pc2, p, ss;

int load() {
  int i;
  
  scanf("%d", &A);
  
  if (!A)
    return 0;
  
  for (i = 0; i < A; i++) {
    scanf("%s %s", U[i].c, ss);
    sscanf(ss, "%lf", &U[i].z);
  }
  
  return 1;
}
  
int main () {

  load();
  
  while (1 == 1) {
  
    strcpy(p, "");
   
    scanf("%s" , p);
  
    if (!strcmp(p, END)) {
      printf("%s\n", END);
      
      if (!load())
        break;
          
      continue;
    }
          
    scanf("%s", pc1);    
    
    if (!strcmp(p, TRANSFER)) {
      scanf("%s", pc2);      
    } 
    
    if (strcmp(p, CREATE) != 0) {
      scanf("%s", ss);
      sscanf(ss, "%lf", &s);      
    }
        
    /*************************/
    
    for (i = 0, index = -1; i < A; i++) {
      if (!strcmp(U[i].c, pc1)) {
        index = i;
        break;
      }
      
    }
    
    if (!strcmp(p, TRANSFER)) {
    
      for (j = 0, index2 = -1; j < A; j++) {
        if (!strcmp(U[j].c, pc2)) {
          index2 = j;
          break;        
        }
      }
      
      printf("%s %.2lf: ", TRANSFER, s);
                
      if ( (index != -1) && (index2 != -1) ) {
      
        if (!strcmp(pc1, pc2)) {
          printf("%s\n", SAME);
          continue;
        }
        
        if (U[index].z < s) {
          printf("%s\n", INSUF);
          continue;
        }
          
        if (pc1[5] != pc2[5]) {
          printf("%s\n", INTERBANK);
        } else
          printf("%s\n", OK);
          
        U[index].z -= s;
        U[index2].z += s;
             
      } else {
        printf("%s\n", NOACC);
      }
          
    }
    
    if (!strcmp(p, CREATE)) {
      printf("%s: ", CREATE);
    
      if (index != -1) {
          printf("%s\n", EXISTS);
          continue;
      } 
        
      printf("%s\n", OK);
        
      strcpy(U[A++].c, pc1);
      U[A].z = 0;
    }
    
    if (!strcmp(p, DEPOSIT)) {
      printf("%s %.2lf: ", DEPOSIT, s);
      
      if (index != -1) {      
        U[index].z += s;        
        printf("%s\n", OK);
        continue;
      }
        
      printf("%s\n", NOACC);   
    }
         
         
    if (!strcmp(p, WITHDRAW)) {
      printf("%s %.2lf: ", WITHDRAW, s);
      
      if (index != -1) {
        if (U[index].z < s) {
          printf("%s\n", INSUF);
          continue;
        }
        
        U[index].z -= s;        
        printf("%s\n", OK);
        
      } else {      
        printf("%s\n", NOACC);
      }      
    } 
    
    /*********************************/
  
  } 
  
  printf("goodbye\n");

  return 0;
}