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#include <iostream>

int main(){
    int n;
    int numbers_Of_Winers = 0;
    scanf("%d", &n);
    for(int i = 0; i<n; i++){
        char c;
        int num;

        scanf(" %c %*c %*c %d", &c, &num);
        if(c == 'N') continue;
        
        if(numbers_Of_Winers<10){
            printf("%d ", i+1);
            numbers_Of_Winers++;
        }else if (num<2 && numbers_Of_Winers<20){
            printf("%d ", i+1);
            numbers_Of_Winers++;
        }
    }
    return 0;
}