using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;

class Myon

{
    public Myon() { }
    public static int Main()
    {
        cin = new Scanner();
        new Myon().calc();
        return 0;
    }
    static Scanner cin;



    string[] S3 =
    {
        "aab",
        "c.b",
        "cdd"
    };

    string[] S4 =
    {
        "aacd",
        "bbcd",
        "cdaa",
        "cdbb"
    };


    string[] S2 =
    {
        "aacd",
        "bbcd"
    };

    string[] S5 =
    {
        "def..",
        "def..",
        "aabdd",
        "c.bee",
        "cddff"
    };

    string[] S7 =
    {
        "..iijaa",
        "..k.jbb",
        "..kllcc",
        "ee.fg..",
        "dd.fg..",
        "abc....",
        "abc...."
    };
    
    int N;
    char[,] C;
    int cnt;

    void add(string[] S)
    {
        for (int i = 0; i < S.Length; i++)
        {
            for (int j = 0; j < S[i].Length; j++)
            {
                if (S[i][j] != '.') C[i + cnt, (j + cnt) % N] = S[i][j];
            }
        }
        cnt += S.Length;
    }


    void calc()
    {
        N = cin.nextInt();
        C = new char[N, N];
        for (int i = 0; i < N; i++)
        {
            for (int j = 0; j < N; j++)
            {
                C[i, j] = '.';
            }
        }

        if (N <= 2) { Console.WriteLine(-1); return; }
        else if (N % 3 == 0)
        {
            for (int i = 0; i < N / 3; i++)
            {
                add(S3);
            }
        }
        else if (N % 2 == 0)
        {
            for (int i = 0; i < N / 2; i++)
            {
                add(S2);
            }
        }
        else
        {
            int nokori = N;
            while(nokori > 7)
            {
                nokori -= 4;
                add(S4);
            }
            if (nokori == 5) add(S5);
            else add(S7);
        }
        for (int i = 0; i < N; i++)
        {
            for (int j = 0; j < N; j++)
            {
                Console.Write(C[i,j]);
            }
            Console.WriteLine();
        }
    }



}


class Scanner
{
    string[] s;
    int i;

    char[] cs = new char[] { ' ' };

    public Scanner()
    {
        s = new string[0];
        i = 0;
    }

    public string next()
    {
        if (i < s.Length) return s[i++];
        string st = Console.ReadLine();
        while (st == "") st = Console.ReadLine();
        s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries);
        if (s.Length == 0) return next();
        i = 0;
        return s[i++];
    }

    public int nextInt()
    {
        return int.Parse(next());
    }
    public int[] ArrayInt(int N, int add = 0)
    {
        int[] Array = new int[N];
        for (int i = 0; i < N; i++)
        {
            Array[i] = nextInt() + add;
        }
        return Array;
    }

    public long nextLong()
    {
        return long.Parse(next());
    }

    public long[] ArrayLong(int N, long add = 0)
    {
        long[] Array = new long[N];
        for (int i = 0; i < N; i++)
        {
            Array[i] = nextLong() + add;
        }
        return Array;
    }

    public double nextDouble()
    {
        return double.Parse(next());
    }


    public double[] ArrayDouble(int N, double add = 0)
    {
        double[] Array = new double[N];
        for (int i = 0; i < N; i++)
        {
            Array[i] = nextDouble() + add;
        }
        return Array;
    }
}


class XRand
{
    uint x, y, z, w;


    public XRand()
    {
        init();
    }

    public XRand(uint s)
    {
        init();
        init_xor128(s);
    }

    void init()
    {
        x = 314159265; y = 358979323; z = 846264338; w = 327950288;

    }

    public void init_xor128(uint s)
    {
        z ^= s;
        z ^= z >> 21; z ^= z << 35; z ^= z >> 4;
        z *= 736338717;
    }

    uint next()
    {
        uint t = x ^ x << 11; x = y; y = z; z = w; return w = w ^ w >> 19 ^ t ^ t >> 8;
    }

    public long nextLong(long m)
    {
        return (long)((((ulong)next() << 32) + next()) % (ulong)m);
    }

    public int nextInt(int m)
    {
        return (int)(next() % m);
    }

    public int nextIntP(int a)
    {
        return (int)Math.Pow(a, nextDouble());
    }

    public int nextInt(int min, int max)
    {
        return min + nextInt(max - min + 1);
    }


    public double nextDouble()
    {
        return (double)next() / uint.MaxValue;
    }

    public double nextDoubleP(double a)
    {
        return Math.Pow(a, nextDouble());
    }
}



Measured memory_bytes: 15840