using System;
using System.Linq;

namespace No001_道のショートカット
{
    class Program
    {
        static int n;
        static int c;
        static int v;
        static int m_mon;
        static int m_dis;

        static int[] s;
        static int[] t;
        static int[] y;
        static int[] m;

        static void Main(string[] args)
        {
             n = int.Parse(Console.ReadLine());
            c = int.Parse(Console.ReadLine());
            v = int.Parse(Console.ReadLine());

            string[] in_s = Console.ReadLine().Split(' ');
            s = in_s.Select(int.Parse).ToArray();
            string[] in_t = Console.ReadLine().Split(' ');
            t = in_t.Select(int.Parse).ToArray();
            string[] in_y = Console.ReadLine().Split(' ');
            y = in_y.Select(int.Parse).ToArray();
            string[] in_m = Console.ReadLine().Split(' ');
            m = in_m.Select(int.Parse).ToArray();

            m_mon = 0;
            m_dis = 0;
            Check(0, 1, 0, 0);

            if (m_dis == 0)
                Console.WriteLine(-1);
            else
                Console.WriteLine(m_dis);
        }

        static void Check(int pos, int level, int money, int distance)
        {
            if (level == n)
            {
                if (money <= c)
                {
                    if ((m_dis >= distance || m_dis == 0) &&
                        (m_mon > money) || m_mon == 0)
                    {
                        m_mon = money;
                        m_dis = distance;
                    }
                }
            }
            else
            {
                for (int i = pos + 1; i < v; i++)
                {
                    int money2 = money;
                    int distance2 = distance;

                    if (s[i] == level)
                    {
                        money2 += y[i];
                        distance2 += m[i];
                        Check(i, t[i], money2, distance2);
                    }
                }
            }
        }
    }
}