#include <iostream>
#include <sstream>
#include <string>

using namespace std;

struct EnumNat
{ string curr;

  EnumNat()
  { curr = "0"; }

  string get()
  { return curr; }

  void move_on()
  { for (int i = curr.length()-1; i >= 0; i -= 1)
    { if (curr[i] == '9')
        curr[i] = '0';
      else
      { curr[i] += 1;
        return; } }
    curr = string("1") + curr; }

  bool finished()
  { return false; }
};

struct EnumEven
{ EnumNat nats;

  EnumEven()
  { }

  string get()
  { return nats.get(); }

  void move_on()
  { nats.move_on();
    nats.move_on(); }

  bool finished()
  { return nats.finished(); }
};

const string alphabet = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ `~!@#$%^&*()-_=+[{]}\\|;:'\",<.>/?";

struct EnumStr
{ string curr;

  EnumStr()
  { curr = ""; }

  string get()
  { return curr; }

  void move_on()
  { for (int i = curr.length()-1; i >= 0; i -= 1)
    { if (curr[i] == '?')
        curr[i] = '0';
      else
      { int pos = alphabet.find(curr[i]);
        curr[i] = alphabet[pos+1];
        return; } }
    curr = string("0") + curr; }

  bool finished()
  { return false; }
};

struct EnumRat
{ int top, bottom;
  
  EnumRat()
  { top = 0;
    bottom = 1; }

  string get()
  { ostringstream os;
    os << top << "/" << bottom;
    return os.str(); }

  void move_on()
  { int diag = top + bottom;
    top -= 1;
    bottom += 1;
    if (top <= 0)
    { top = diag;
      bottom = 1; } }

  bool finished()
  { return false; }
};

int main()
{ EnumNat En;
  EnumRat Eq;
  while (! En.finished() && ! Eq.finished())
  { cout << En.get() << " -> " << Eq.get() << "\n";
    En.move_on();
    Eq.move_on(); } }