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#include<cstdio>

int main() {
    int n;
    scanf("%d\n", &n);

    int counter = 0;

    for (int j = 0; j < n; j++) {
        char c;
        for (int i = 0; i < 3; i++) {
            c = getc(stdin);
        }
        int x;

        scanf("%d\n", &x);
        if (c == 'K') {
            if (counter < 10 || x < 2) {
                printf("%d ", (j+1));
                counter++;
                if (counter == 20) break;
            }
        }
    }

    return 0;
}