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#include <cstdio>


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