#include <iostream>
#include <iomanip>

using namespace std;

struct account {
  char* number;
  double value;
};

int main(void) {
  while(true) {
    int number;
    cin >> number; cin.clear();
    
    if (number == 0) {
      cout << "goodbye";
      return 0;
    }

    account* ucet = new account[(number+1000)];
    for(int i=0; i<number;i++) {
      ucet[i].number = new char[7];
      cin >> ucet[i].number; cin.clear();
      cin >> ucet[i].value; cin.clear();
    }
    
    char* command = new char[9];
    
    char* acc = new char[7];
    char* acctwo = new char[7];
    double value;
    while(true) {  
      cin >> command; cin.clear();
      if (strcmp(command, "end") == 0) {
	cout << "end" << endl;
	cin.get();
	cout << endl;
	break;
	} 
      
      else if (strcmp(command, "withdraw") == 0) {
	cin >> acc; cin.clear();
	cin >> value; cin.clear();
	
	cout << "withdraw " << setprecision(2) << showpoint << fixed << value << ": ";
	int found = 0;
	for (int i=0; i<number; i++) {
	  if (strcmp(ucet[i].number, acc)==0) {
	    if (ucet[i].value < value) {
	      found = 1;
	      cout << "insufficient funds" << endl;
	      break;
	    } else {
	      found = 1;
	      ucet[i].value = ucet[i].value - value;
	      cout << "ok" << endl;
	      break;
	    }
	  } 
	}
	if (found == 0) {
	    cout << "no such account" << endl;
	   
	}
      } else if(strcmp(command, "deposit") == 0) {
	cin >> acc; cin.clear();
	cin >> value; cin.clear();
	
	cout << "deposit " << setprecision(2) << showpoint << fixed << value << ": ";
	int found = 0;
	for (int i=0; i<number; i++) {
	  if (strcmp(ucet[i].number, acc)==0) {
	    ucet[i].value = ucet[i].value + value;
	    cout << "ok" << endl;
	    found = 1;
	    break;
	  } 
	}
	if (found == 0) {
	  cout << "no such account" << endl;
	  break;
	}	
      } else if (strcmp(command, "create") == 0) {
	cin >> acc; cin.clear();
	cout << "create: ";
	
	int found = 0;
	for (int i=0; i<number; i++) {
	  if (strcmp(ucet[i].number, acc)==0) {
	    found = 1;
	    cout << "already exists" << endl;
	    break;
	  }
	}
	if (found == 0) {
	  cout << "ok" << endl;
	  ucet[number].number = new char[7];
	  strcpy(ucet[number].number, acc);
	  ucet[number].value = 0;
	  number++;
	}

      } else if(strcmp(command, "transfer") == 0) {
	cin >> acc; cin.clear();
	cin >> acctwo; cin.clear();
	cin >> value; cin.clear();

	cout << "transfer " << setprecision(2) << showpoint << fixed << value << ": ";
	
	int found = 0;
	int foundtwo = 0;

	double val = 0;

	int index = 0;
	int indextwo = 0;
	if (strcmp(acc, acctwo) == 0) {
	  cout << "same account" << endl;
	} else {
	  for (int i=0; i<number; i++) {
	    if (strcmp(ucet[i].number, acc)==0 && found==0) {
	      found = 1;
	      val = ucet[i].value;
	      index = i;
	    }
	    
	    if (strcmp(ucet[i].number, acctwo)==0 && foundtwo==0) {
	      foundtwo = 1;
	      indextwo = i;
	    }
	    
	    if (found == 1 && foundtwo == 1) { break;}
	  }
	  //	  cout << endl << val << endl << value << endl;
	  if (found == 0 || foundtwo == 0) {
	    cout << "no such account" << endl;
	  } else if (val < value) {
	    cout << "insufficient funds" << endl;
	  } else {
	    ucet[index].value = ucet[index].value - value;
	    ucet[indextwo].value = ucet[indextwo].value + value;
	    if(ucet[index].number[5] != ucet[indextwo].number[5]) {
	      cout << "interbank" << endl;
	    } else {
	      cout << "ok" << endl;
	    }
	  }
	}
      }
      if (number == 0) { return 0; }
      
    }
  }
    return 0;
}