#include<bits/stdc++.h>
using namespace std;
int num,w,m,t,n,q[1001],s[1001],x=0;
int main(){
	cin>>num;
	for(int i=0;i<num;i++){
		cin>>w>>m>>t;
		if(w==0){
			n+=m;
			cout<<"a";
			q[x]=m;
			s[x]=t+45;
			x++;
		}else{
			if(!x){
				n+=m;
				cout<<"b";
			}else{
				for(int j=x;j>0;j--){
					if(s[j]<=t&&q[j]<=m){
						s[j]=-9999999;
						q[j]=9999999;
						break;
					}else{
						n+=m;
						cout<<"c";
					}
				}
			}
		}
	}
	cout<<n;
	return 0;
}