#include<iostream>
#include<cstdlib>
#include<cstdio>
#include<cstring>
using namespace std;
int q[300001]={0};
int ss;
int tou,wei;
int main()
{
	freopen ("cline.in","r",stdin);
	freopen ("cline.out","w",stdout);
	tou=wei=100000;
	cin>>ss;
	int ji=1;
	char s,l;
	int c=0;
	while (ss)
	{
		cin>>s;
		c++;
		if (s=='A')
		{
			ll:;
			cin>>l;
			if (l=='D')
				goto rr;
			if (l=='L')
			{
				tou--;
				q[tou]=ji;
				ji++;
				ss--;
			}
			if (l=='R')
			{
				q[wei]=ji;
				ji++;
				wei++;
				ss--;
			}
			else
			{
				continue;
			}
		}
		if (s=='D')
		{
			rr:;
			cin>>l;
			if (l=='A')
				goto ll;
			if (l=='L')
			{
				char p;
				cin>>p;
				if (p=='A')
				{
					goto ll;
				}
				int a;
				a=p-'0';
				tou+=a;
				ss--;
			}
			if (l=='R')
			{
				char p;
				cin>>p;
				if (p=='A')
				{
					goto ll;
				}
				int a;
				a=p-'0';
				wei-=a;
				ss--;
			}
		}
		if (c>ss*4)
			break;
	}
	for (int i=tou;i<wei;i++)
		cout<<q[i]<<endl;
	return 0;
}