using System;
using System.Collections.Generic;
using System.Collections;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.IO;
using System.Reflection;
using static System.Math;
using System.Numerics;
static class Program{
	const int mod=(int)1e9+7;
	static void Main(){
		Sc sc=new Sc();
		var n=sc.I;
		int[][] a=new int[n][];
		var t=new string[][]{
			new string[]{},
			new string[]{},
			new string[]{},
			new string[]{},
			new string[]{
				"eech",
				"aach",
				"bjdd",
				"bjll"
			},
			new string[]{
				"eeahh",
				"a.add",
				"acchh",
				"bjb..",
				"bjb.."
			},
			new string[]{
				"aa.aac",
				"..jb.c",
				"..jbhh",
				"aacaa.",
				"b.c..d",
				"bdd..d"
			},
			new string[]{
				"aa.aa.c",
				"..b..bc",
				"..b..bh",
				"aa.aa.h",
				"..b.eb.",
				"..b.eb.",
				"bbjj.dd"
			}
		};
		if(n<=2){
			Console.WriteLine("{0}",-1);
		}
		else if(n==3){
			Console.WriteLine("aac");
			Console.WriteLine("b.c");
			Console.WriteLine("bdd");
		}
		else{
			var c=new char[n][];
			for(int i = 0;i<n;i++) {c[i]=new string('.',n).ToCharArray();}
			int p=0;
			while(p<n){
				int z=0;
				if((n-p)%4==0){z=4;}
				else if(n-p>16||n-p==13||(n-p)%5==4||(n-p)%5==0){z=5;}
				else if((n-p)%6==0){z=6;}
				else{z=7;}
				for(int i = 0;i<z;i++) {
					for(int j = 0;j<z;j++) {c[p+i][p+j]=t[z][i][j];}
				}
				p+=z;
			}
			for(int i = 0;i<n;i++) {
				Console.WriteLine("{0}",String.Join("",c[i]));
			}
		}
	}
}

public class Sc{
	public int I{get{return int.Parse(Console.ReadLine());}}
	public long L{get{return long.Parse(Console.ReadLine());}}
	public double D{get{return double.Parse(Console.ReadLine());}}
	public string S{get{return Console.ReadLine();}}
	public int[] Ia{get{return Array.ConvertAll(Console.ReadLine().Split(),int.Parse);}}
	public long[] La{get{return Array.ConvertAll(Console.ReadLine().Split(),long.Parse);}}
	public double[] Da{get{return Array.ConvertAll(Console.ReadLine().Split(),double.Parse);}}
	public string[] Sa{get{return Console.ReadLine().Split();}}
	public object[] Oa{get{return Console.ReadLine().Split();}}
	public int[] Ia2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),int.Parse);}}
	public int[] Ia3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),int.Parse);}
	public int[] Ia3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),int.Parse);}
	public long[] La2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),long.Parse);}}
	public long[] La3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),long.Parse);}
	public long[] La3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),long.Parse);}
	public T[] Arr<T>(int n,Func<T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f();}return a;}
	public T[] Arr<T>(int n,Func<int,T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i);}return a;}
	public T[] Arr<T>(int n,Func<string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(Console.ReadLine().Split());}return a;}
	public T[] Arr<T>(int n,Func<int,string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i,Console.ReadLine().Split());}return a;}
}

Measured memory_bytes: 22808