using System;
using System.Collections.Generic;
using static System.Console;
using System.Linq;

class yuki325
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(int n) => Enumerable.Repeat(0, n).Select(_ => NList).ToArray();
    static void Main()
    {
        var k = NN;
        var q = new Queue<char>[4];
        for (var i = 0; i < q.Length; ++i) q[i] = new Queue<char>();
        for (var i = 0; i < 5; ++i) q[i % 4].Enqueue((char)('A' + i));
        
        for (var i = 0; i < k; ++i)
        {
            var c = q[i % 4].Dequeue();
            q[(i + 1) % 4].Enqueue(c);
        }

        for (var i = 0; i < q.Length; ++i)
        {
            while (q[i].Count > 0) Write(q[i].Dequeue());
            WriteLine();
        }
    }
}