#include<bits/stdc++.h>
#define int long long
using namespace std;
int lhs[100005],rhs[100005];
int lc=0,rc=0;
int nb=0;
signed main(){
    int n;
    cin>>n;
    while (n--){
        char a,b;
        cin>>a>>b;
        if (a=='A' and b=='L'){
            lhs[++lc]=++nb;
        }
        else if (a=='A' and b=='R'){
            rhs[++rc]=++nb;
        }
        else if (a=='D' and b=='L'){
            int k;
            cin>>k;
            lc-=k;
        }
        else if (a=='D' and b=='R'){
            int k;
            cin>>k;
            rc-=k;
        }
    }
    for (int i=lc;i>=1;i--){
        cout<<lhs[i]<<endl;
    }
    for (int i=1;i<=rc;i++){
        cout<<rhs[i]<<endl;
    }
    return 0;
}

90pts第一个点WA求调