using Microsoft.VisualBasic.CompilerServices;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;

namespace ConsoleApp2
{
    class Program
    {
        private static string input;

        private static string[] bookWords;
        private static int[] bookValue;
        private static void InitializeBook(int q)
        {
            bookWords = new string[q];
            bookValue = new int[q];

            for (int i = 0; i < q; i++)
            {
                string[] tokens = Console.ReadLine().Split(' ');
                bookWords[i] = tokens[0];
                bookValue[i] = int.Parse(tokens[1]);
            }
        }

        private static int[] LettersCount(string word, int from, int to)
        {
            int[] result = new int[26]; // 26 - кол-во буква в алфавите
            for(int i = from; i < to; i++)
            {
                result[(int)word[i] - 97] ++;
            }
            return result;
        }

        private static int PickWords(int index)
        {
            int result = -1;
            for (int i = 0; i < bookWords.Length; i++)
            {
                if (bookWords[i].Length <= input.Length - index
                    && Enumerable.SequenceEqual(LettersCount(bookWords[i], 0, bookWords[i].Length), LettersCount(input, index, index + bookWords[i].Length)))
                {
                    int pathResult;
                    if (input.Length == index + bookWords[i].Length)
                    {
                        pathResult = 0;
                    }
                    else pathResult = PickWords(index + bookWords[i].Length);
                    if (pathResult != -1 && result == -1 || (pathResult != -1 && pathResult + bookValue[i] < result))
                        result = pathResult + bookValue[i];
                }
            }
            return result;
        }
        static void Main(string[] args)
        {
            input = Console.ReadLine();
            int result = -1;
            int q = int.Parse(Console.ReadLine()); 
            InitializeBook(q);

            result = PickWords(0);

            Console.WriteLine(result);
        }
    }
}