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#include <iostream>
#include <cstdint>
#include <string>

namespace {
    using uint_t = uint_fast32_t;
    using std::cin, std::cout;
    using std::string;

    constexpr uint_t PROG_1 = 10;
    constexpr uint_t PROG_2 = 20;
    constexpr uint_t MAX_FINAL = 2;
}

int main() {
    uint_t n;
    string s;
    uint_t x;
    uint_t ile = 0;

    cin >> n;
    for (uint_t k = 1; ile < PROG_2 && k <= n; ++k) {
        cin >> s >> x;
        if (s[0] == 'T') {
            if (ile < PROG_1) {
                cout << k << ' ';
                ++ile;
            } else if (x < MAX_FINAL && ile < PROG_2) {
                cout << k;
                ++ile;
                if (ile < PROG_2) cout << ' ';
                else cout << '\n';
            }
         }
    }
}