#include <cstdio>
#include <cstring>

float banka[10000][10];

int main()
{
  int uctu;
  for(;;)
  {
    scanf("%d", &uctu);
    if (!uctu)
    {
      printf("goodbye\n");
      return 0;
    }
    for(int i = 0; i < 10000; i++)
    {
      for (int j = 0; j < 10; j++)
      {
        banka[i][j] = -1.0;
      }
    }
    int tmp1, tmp2;
    for (int i = 0; i < uctu; i++)
    {
      scanf("%d/%d", &tmp1, &tmp2);
      scanf("%f", &banka[tmp1][tmp2]);
    }
    char str[30];
    for(;;)
    {
      scanf("%s", str);
      if (!strcmp(str, "end"))
      {
        printf("end\n\n");
        break;
      }
      if (!strcmp(str, "create"))
      {
        int tmp1, tmp2;
        scanf("%d/%d", &tmp1, &tmp2);
        if (banka[tmp1][tmp2] == -1.0)
        {
          banka[tmp1][tmp2] = 0.0;
          printf("create: ok\n");
        }
        else
        {
          printf("create: already exists\n");
        }
      }
      if (!strcmp(str, "deposit"))
      {
        int tmp1, tmp2;
        float tmp3;
        scanf("%d/%d%f", &tmp1, &tmp2, &tmp3);
        if (banka[tmp1][tmp2] == -1.0)
        {
          printf("deposit %.2f: no such account\n", tmp3);
        }
        else
        {
          banka[tmp1][tmp2] += tmp3;
          printf("deposit %.2f: ok\n", tmp3);
        }
      }
      if (!strcmp(str, "withdraw"))
      {
        int tmp1, tmp2;
        float tmp3;
        scanf("%d/%d%f", &tmp1, &tmp2, &tmp3);
        if (banka[tmp1][tmp2] == -1)
        {
          printf("withdraw %.2f: no such account\n", tmp3);
        }
        else
        {
          if (banka[tmp1][tmp2] >= tmp3)
          {
            banka[tmp1][tmp2] -= tmp3;
            printf("withdraw %.2f: ok\n", tmp3);
          }
          else
          {
            printf("withdraw %.2f: insufficient funds\n", tmp3);
          }
        }
      }
      if (!strcmp(str, "transfer"))
      {
        int tmp1, tmp2, tmp4, tmp5;
        float tmp3;
        scanf("%d/%d%d/%d%f", &tmp1, &tmp2, &tmp4, &tmp5, &tmp3);
        if (banka[tmp1][tmp2] == -1 || banka[tmp4][tmp5] == -1)
        {
          printf("transfer %.2f: no such account\n", tmp3);
        }
        else
        {
          if (tmp1 == tmp4 && tmp2 == tmp5)
          {
            printf("transfer %.2f: same account\n", tmp3);
          }
          else if (banka[tmp1][tmp2] >= tmp3)
          {
            banka[tmp1][tmp2] -= tmp3;
            banka[tmp4][tmp5] += tmp3;
            if (tmp2 == tmp5)
              printf("transfer %.2f: ok\n", tmp3);
            else
              printf("transfer %.2f: interbank\n", tmp3);
          }
          else printf("transfer %.2f: insufficient funds\n", tmp3);
        }
      }
    }
  }
}