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#include <cstdio>
#define FOR(i,a,b) for(int i=(int)(a); i<(int)(b); ++i)
using namespace std;

char s[10];
int n, found, c;

int main(){
    scanf("%d", &n);
    found = 0;
    FOR(i,0,n) {
        if (found == 20) break;
        scanf("%s %d", &s, &c);
        if (s[0] == 'N') continue;
        if (found >= 10 && c >= 2) continue;
        printf("%d ", i+1);
        ++found;
    }
    printf("\n");
}