#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define int long long
using namespace __gnu_pbds;
using namespace std;
signed main() 
{
	queue<char>q;
	int n;
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		string s;
		cin>>s;
		if(s!="<bs>")q.push(s[0]);
		else if(!q.empty()) q.pop();
	}
	while(!q.empty())
	{
		cout<<q.front();
		q.pop();
	}
    return 0;
}