using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
class P
{
    static int[,] d;
    static int c;
    static void Main()
    {
        int n = ReadInt();
        c = ReadInt();
        d = new int[c, c];
        for (int i = 0; i < c; i++)
            for (int j = 0; j < c; j++)
                d[i, j] = ReadInt();
        List<int> m0 = new List<int>();
        List<int> m1 = new List<int>();
        List<int> m2 = new List<int>();
        for (int i = 1; i <= n; i++)
        {
            for (int j = 1; j <= n; j++)
            {
                int m = ReadInt();
                if ((i + j) % 3 == 0)
                    m0.Add(m);
                if ((i + j) % 3 == 1)
                    m1.Add(m);
                if ((i + j) % 3 == 2)
                    m2.Add(m);
            }
        }
        //WriteLine(m0);
        //WriteLine(m1);
        //WriteLine(m2);
        int[] md0 = calc(m0);
        int[] md1 = calc(m1);
        int[] md2 = calc(m2);
        int ans = int.MaxValue;
        for (int i = 0; i < c; i++)
        {
            for (int j = 0; j < c; j++)
            {
                for (int k = 0; k < c; k++)
                {
                    if (i == j || j == k || k == i)
                        continue;
                    //if (md0[i] + md1[j] + md2[k] < ans)
                    //    WriteLine(i.ToString() + j + k);
                    ans = Math.Min(ans, md0[i] + md1[j] + md2[k]);
                }
            }
        }
        WriteLine(ans);
    }
    static int[] calc(List<int> l)
    {
        List<int> ls = new List<int>();
        for (int i = 1; i <= c; i++)
        {
            int temp = 0;
            foreach (var n in l)
                temp += d[n - 1, i - 1];
            ls.Add(temp);
        }
        return ls.ToArray();
    }
    //以下標準出入力用のメソッド
    [System.Runtime.InteropServices.DllImport("msvcrt.dll")]
    private static extern int scanf(string format, out long l);
    public static long ReadLong()
    {
        long l;
        scanf("%ld", out l);
        return l;
    }
    public static int ReadInt()
    {
        return (int)ReadLong();
    }
    public static int[] ReadInts(int n)
    {
        int[] nums = new int[n];
        for (int i = 0; i < n; i++)
            nums[i] = ReadInt();
        return nums;
    }
    public static long[] ReadLongs(int n)
    {
        long[] nums = new long[n];
        for (int i = 0; i < n; i++)
            nums[i] = ReadLong();
        return nums;
    }
    [System.Runtime.InteropServices.DllImport("msvcrt.dll")]
    private static extern int scanf(string format, out double l);
    public static double ReadDouble()
    {
        double d;
        scanf("%lf", out d);
        return d;
    }
    [System.Runtime.InteropServices.DllImport("msvcrt.dll")]
    private static extern int scanf(string format, out char c);
    public static char ReadChar()
    {
        char c;
        while (true)
        {
            scanf("%c", out c);
            if (c != '\n')
                break;
        }
        return c;
    }
    public static string ReadLine()
    {
        StringBuilder sb = new StringBuilder();
        char c;
        do
        {
            scanf("%c", out c);
            if (c != '\n')
                sb.Append(c);
        } while (c != '\n');
        return sb.ToString();
    }
    [System.Runtime.InteropServices.DllImport("msvcrt.dll")]
    private static extern void printf(string s);
    public static void Write(string s) { printf(s); }
    public static void Write(char c) { printf(c.ToString()); }
    public static void Write(long n) { printf(n.ToString()); }
    public static void Write(int n) { printf(n.ToString()); }
    public static void Write(double d) { printf(d.ToString()); }
    public static void WriteLine() { printf("\n"); }
    public static void WriteLine(string s) { printf(s + "\n"); }
    public static void WriteLine(char c) { WriteLine(c.ToString()); }
    public static void WriteLine(long n) { WriteLine(n.ToString()); }
    public static void WriteLine(int n) { WriteLine(n.ToString()); }
    public static void WriteLine(double d) { WriteLine(d.ToString()); }
    public static void WriteLine(string[] s)
    {
        for (int i = 0; i < s.Length - 1; i++)
            Write(s[i] + " ");
        WriteLine(s[s.Length - 1]);
    }
    public static void WriteLine(char[] c)
    {
        for (int i = 0; i < c.Length - 1; i++)
            Write(c[i] + " ");
        WriteLine(c[c.Length - 1]);
    }
    public static void WriteLine(long[] n)
    {
        for (int i = 0; i < n.Length - 1; i++)
            Write(n[i] + " ");
        WriteLine(n[n.Length - 1]);
    }
    public static void WriteLine<T>(ICollection<T> ic)
    {
        foreach (var i in ic)
            Write(i + " ");
        WriteLine("\b");
    }
    public static void WriteLine(int[] n)
    {
        for (int i = 0; i < n.Length - 1; i++)
            Write(n[i] + " ");
        WriteLine(n[n.Length - 1]);
    }
    public static void WriteLine(double[] d)
    {
        for (int i = 0; i < d.Length - 1; i++)
            Write(d[i] + " ");
        WriteLine(d[d.Length - 1]);
    }
    public static void WriteLines(string[] s) { foreach (var i in s) WriteLine(i); }
    public static void WriteLines(char[] c) { foreach (var i in c) WriteLine(i); }
    public static void WriteLines(long[] c) { foreach (var i in c) WriteLine(i); }
    public static void WriteLines(int[] c) { foreach (var i in c) WriteLine(i); }
    public static void WriteLines(double[] d) { foreach (var i in d) WriteLine(i); }
    public static void WriteLines<T>(ICollection<T> ic) { WriteLines(ic.ToArray()); }
}

Measured memory_bytes: 15712