//
//  main.cpp
//  Витамины
//
//  Created by Владислав on 05/09/2019.
//  Copyright © 2019 Владислав. All rights reserved.
//

#include <iostream>
#include <string>
#include <cmath>
#include <algorithm>
#define int long long

using namespace std;

int n, mina, minb, minc, minab, minac, minbc, minabc;

signed main() {
    cin >> n;
    mina = 1000000000, minb = 1000000000, minc = 1000000000, minab = 1000000000, minac = 1000000000, minbc = 1000000000, minabc = 1000000000;
    for(int i = 0; i < n; i++) {
        int c;
        string s;
        cin >> c >> s;
        if(s == "A") {
            mina = min(mina, c);
        }
        if(s == "B") {
            minb = min(minb, c);
        }
        if(s == "C") {
            minc = min(minc, c);
        }
        if(s == "AB" || s == "BA") {
            minab = min(minab, c);
        }
        if(s == "AC" || s == "CA") {
            minac  = min(minac, c);
        }
        if(s == "BC" || s == "CB") {
            minbc = min(minbc, c);
        }
        if(s == "ABC" || s == "ACB" || s == "CAB" || s == "CBA" || s == "CAB" || s == "BAC" || s == "BCA") {
            minabc = min(minabc, c);
        }
    }
    int ans = 1000000000;
//    cout << mina << " " << minb << " " << minc << '\n';
    ans = min(mina + minb + minc, minabc);
    ans = min(ans, minab + minc);
    ans = min(ans, minac + minb);
    ans = min(ans, minbc + mina);
    ans = min(ans, minab + minbc);
    ans = min(ans, minab + minac);
    ans = min(ans, minac + minbc);
    if(ans >= 1e6) {
        cout << -1 << '\n';
        return 0;
    }
    cout << ans << '\n';
    return 0;
}