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#include <iostream>

int main() {
  int count = 0;
  int index = 0;

  int tmp;
  std::cin >> tmp;

  while (count < 20) {
    ++index;

    std::string s;
    int a;
    std::cin >> s;
    std::cin >> a;

    if (s == "NIE") {
      continue;
    }

    if (count < 10) {
      ++count;
      std::cout << index << " ";
      continue;
    }

    if (a >= 2) {
      continue;
    }

    ++count;
    std::cout << index << " ";
  }

  std::cout << std::endl;
  return 0;
}