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def solve():
  answer = []
  n = int(input())
  for i in range(n):
    s, x = input().split()
    if s != 'TAK':
      continue
    if len(answer) < 10:
      answer.append(i + 1)
    elif int(x) < 2:
      answer.append(i + 1)
    if len(answer) >= 20:
      break
  print(*answer)


if __name__ == "__main__":
  solve()