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#include <iostream>

void prog_main(std::istream& in, std::ostream& out)
{
	uint32_t num = 0;
	in >> num;
	std::string was;
	uint32_t finals = 0;
	uint32_t i;
	uint32_t finalists = 0;
	for (i = 1; i <= num && finalists < 10; ++i) {
		in >> was;
		in >> finals;
		if (was.c_str()[0] == 'T')
		{
			++finalists;
			out << i << " ";
		}
	}
	for (; i <= num && finalists < 19; ++i) {
		in >> was;
		in >> finals;
		if (was.c_str()[0] == 'T')
		{
			if (finals < 2) {
				++finalists;
				out << i << " ";
			}
		}
	}
	for (; i <= num && finalists < 20; ++i) {
		in >> was;
		in >> finals;
		if (was.c_str()[0] == 'T')
		{
			if (finals < 2) {
				++finalists;
				out << i << std::endl;
				return;
			}
		}
	}
}

#ifndef TEST
int main(int argc, char* argv[])
{
	prog_main(std::cin, std::cout);
	return 0;
}
#endif