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#include <bits/stdc++.h>

using namespace std;

int main() {
    cin.tie(0);
    
    int n; cin >> n;

    int total = 0;

    for(int i = 0; i<n; i++){
         char c; cin >> c >> c >> c;
         int x; cin >> x;
         
         if(c == 'E') continue;
         if (x >= 2 && total >= 10) continue;
         cout << i+1 << " ";
          total ++;
          if (total == 20) return 0;
    }


    return 0;
}