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#include <cstdio>
#include <cstdlib>
#include <algorithm>

int main(void){
    int n=0, x=0; 
    int first = 10;
    int second = 10;
    scanf("%d", &n);
    char *t = (char *)malloc(4*sizeof(char));
 
    for (int i = 0; i < n; ++i)
    {
        scanf("%s %d", t, &x);

        if(t[0]=='N')
        {
            continue;
        }

        if(first>0){
            printf("%d ", i + 1);
            --first;
        } 
        else if(second>0) {
            if(x<2){
                printf("%d ", i + 1);
                --second;
            }
        } else {
            break;
        }
    }
    
    printf("\n");
    
    return 0;
}