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#include <cstdio>

int main()
{
  int n;
  scanf("%i ", &n);
  for (int i = 0, j = 0; i<n && j<20; i++)
  {
    char a[4];
    int b;
    scanf("%s %i ", a, &b);
    if (a[0]=='T' && (j<10 || b<2))
    printf("%i%c", i+1, " \n"[++j>19]);
  }
  return 0;
}