#include <bits/stdc++.h>
using namespace std;
//written by RyRyyyy
//feel free to hack!
//https ://codeforces.com /contest/1042/problem/B
int main(){
	//long d,i,c,k;	//just in case
	int n;
	cin>>n;
	map<string, int> p;
	p["A"] = p["B"] = p["C"]= p["AB"] = p["BC"] = p["AC"] = p["ABC"] = 1e9;
	for(int i=0;i<n;i++){
		int c;
		string s;
		cin>>c>>s;
		sort(s.begin(),s.end());
		p[s]=min(p[s],c);
	}
 
	p["AB"] = min(p["AB"], p["A"]+p["B"]);
 	p["BC"] = min(p["BC"], p["B"]+p["C"]);
  	p["AC"] = min(p["AC"], p["A"]+p["C"]);
	//clm dai vai lozzzzz!!!! :"<
   p["ABC"] = min(p["ABC"], min({p["AB"]+p["C"], p["BC"]+p["A"], p["AC"]+p["B"]}));
   p["ABC"] = min(p["ABC"], min({p["AB"]+p["AC"], p["BC"]+p["AB"], p["AC"]+p["BC"]}));
	if(p["ABC"]==1e9)cout<<-1<<endl;
	else cout<<p["ABC"]<<endl;
 
}

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NgoxMDAgQQozNTUgQkNBCjE1MCBCQwoxNjAgQUMKMTgwIEIKMTkwIENBCg==

6
100 A
355 BCA
150 BC
160 AC
180 B
190 CA