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#include <cstdio>
#include <string>

using namespace std;

int main()
{
    int n = 20;
    scanf("%d", &n);
    int pointer = 0;
    for (int i = 1; i <= n; i++){
        if (pointer == 20) break;
        char s[4] = ""; int x = 0;
        scanf(" %s %d", s, &x);
        if (s[0] == 'N') continue;
        if (pointer < 10) {
            pointer++;
            printf("%d ", i);
        } else {
            if (x >= 2) continue;
            pointer++;
            printf("%d ", i);
        }
    }

    return 0;
}